Fix api interfaces for orchestration resources

Some of the interfaces don't correspond well to the values
expected by the requests and returned by api.
diff --git a/openstack/orchestration/v1/stacks/fixtures.go b/openstack/orchestration/v1/stacks/fixtures.go
index 3a621da..f884d51 100644
--- a/openstack/orchestration/v1/stacks/fixtures.go
+++ b/openstack/orchestration/v1/stacks/fixtures.go
@@ -63,6 +63,7 @@
 		CreationTime: time.Date(2015, 2, 3, 20, 7, 39, 0, time.UTC),
 		Status:       "CREATE_COMPLETE",
 		ID:           "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
+		Tags:         []string{"rackspace", "atx"},
 	},
 	ListedStack{
 		Description: "Simple template to test heat commands",
@@ -78,6 +79,7 @@
 		UpdatedTime:  time.Date(2014, 12, 11, 17, 40, 37, 0, time.UTC),
 		Status:       "UPDATE_COMPLETE",
 		ID:           "db6977b2-27aa-4775-9ae7-6213212d4ada",
+		Tags:         []string{"sfo", "satx"},
 	},
 }
 
@@ -98,7 +100,8 @@
     "creation_time": "2015-02-03T20:07:39",
     "updated_time": null,
     "stack_status": "CREATE_COMPLETE",
-    "id": "16ef0584-4458-41eb-87c8-0dc8d5f66c87"
+    "id": "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
+	"tags": ["rackspace", "atx"]
   },
   {
     "description": "Simple template to test heat commands",
@@ -113,7 +116,8 @@
     "creation_time": "2014-12-11T17:39:16",
     "updated_time": "2014-12-11T17:40:37",
     "stack_status": "UPDATE_COMPLETE",
-    "id": "db6977b2-27aa-4775-9ae7-6213212d4ada"
+    "id": "db6977b2-27aa-4775-9ae7-6213212d4ada",
+	"tags": ["sfo", "satx"]
   }
   ]
 }
@@ -165,6 +169,7 @@
 	Status:              "CREATE_COMPLETE",
 	ID:                  "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
 	TemplateDescription: "Simple template to test heat commands",
+	Tags:                []string{"rackspace", "atx"},
 }
 
 // GetOutput represents the response body from a Get request.
@@ -194,7 +199,8 @@
     "stack_status": "CREATE_COMPLETE",
     "updated_time": null,
     "id": "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
-    "template_description": "Simple template to test heat commands"
+    "template_description": "Simple template to test heat commands",
+	"tags": ["rackspace", "atx"]
   }
 }
 `
@@ -248,7 +254,6 @@
 		"OS::stack_name": "postman_stack",
 		"OS::stack_id":   "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
 	},
-	StatusReason: "Stack CREATE completed successfully",
 	Name:         "postman_stack",
 	CreationTime: time.Date(2015, 2, 3, 20, 7, 39, 0, time.UTC),
 	Links: []gophercloud.Link{
@@ -259,7 +264,6 @@
 	},
 	Capabilities:        []interface{}{},
 	NotificationTopics:  []interface{}{},
-	Status:              "CREATE_COMPLETE",
 	ID:                  "16ef0584-4458-41eb-87c8-0dc8d5f66c87",
 	TemplateDescription: "Simple template to test heat commands",
 }
@@ -316,6 +320,20 @@
 			"type":        "OS::Nova::Server",
 		},
 	},
+	Files: map[string]string{
+		"file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml": "heat_template_version: 2014-10-16\nparameters:\n  flavor:\n    type: string\n    description: Flavor for the server to be created\n    default: 4353\n    hidden: true\nresources:\n  test_server:\n    type: \"OS::Nova::Server\"\n    properties:\n      name: test-server\n      flavor: 2 GB General Purpose v1\n image: Debian 7 (Wheezy) (PVHVM)\n",
+	},
+	StackUserProjectID: "897686",
+	ProjectID:          "897686",
+	Environment: map[string]interface{}{
+		"encrypted_param_names": make([]map[string]interface{}, 0),
+		"parameter_defaults":    make(map[string]interface{}),
+		"parameters":            make(map[string]interface{}),
+		"resource_registry": map[string]interface{}{
+			"file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml": "file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml",
+			"resources": make(map[string]interface{}),
+		},
+	},
 }
 
 // AbandonOutput represents the response body from an Abandon request.
@@ -354,21 +372,35 @@
       "name": "hello_world",
       "resource_id": "8a310d36-46fc-436f-8be4-37a696b8ac63",
       "action": "CREATE",
-      "type": "OS::Nova::Server",
+      "type": "OS::Nova::Server"
     }
-  }
+  },
+  "files": {
+    "file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml": "heat_template_version: 2014-10-16\nparameters:\n  flavor:\n    type: string\n    description: Flavor for the server to be created\n    default: 4353\n    hidden: true\nresources:\n  test_server:\n    type: \"OS::Nova::Server\"\n    properties:\n      name: test-server\n      flavor: 2 GB General Purpose v1\n image: Debian 7 (Wheezy) (PVHVM)\n"
+},
+  "environment": {
+	"encrypted_param_names": [],
+	"parameter_defaults": {},
+	"parameters": {},
+	"resource_registry": {
+		"file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml": "file:///Users/prat8228/go/src/github.com/rackspace/rack/my_nova.yaml",
+		"resources": {}
+	}
+  },
+  "stack_user_project_id": "897686",
+  "project_id": "897686"
 }`
 
 // HandleAbandonSuccessfully creates an HTTP handler at `/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c87/abandon`
 // on the test handler mux that responds with an `Abandon` response.
-func HandleAbandonSuccessfully(t *testing.T) {
-	th.Mux.HandleFunc("/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c87/abandon", func(w http.ResponseWriter, r *http.Request) {
+func HandleAbandonSuccessfully(t *testing.T, output string) {
+	th.Mux.HandleFunc("/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c8/abandon", func(w http.ResponseWriter, r *http.Request) {
 		th.TestMethod(t, r, "DELETE")
 		th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
 		th.TestHeader(t, r, "Accept", "application/json")
 
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
-		fmt.Fprintf(w, AbandonOutput)
+		fmt.Fprintf(w, output)
 	})
 }
diff --git a/openstack/orchestration/v1/stacks/requests.go b/openstack/orchestration/v1/stacks/requests.go
index 0dd6af2..bd8e59e 100644
--- a/openstack/orchestration/v1/stacks/requests.go
+++ b/openstack/orchestration/v1/stacks/requests.go
@@ -2,6 +2,7 @@
 
 import (
 	"errors"
+	"strings"
 
 	"github.com/rackspace/gophercloud"
 	"github.com/rackspace/gophercloud/pagination"
@@ -60,6 +61,8 @@
 	Parameters map[string]string
 	// (OPTIONAL) The timeout for stack creation in minutes.
 	Timeout int
+	// (OPTIONAL) A list of tags to assosciate with the Stack
+	Tags []string
 }
 
 // ToStackCreateMap casts a CreateOpts struct to a map.
@@ -97,6 +100,9 @@
 		s["timeout_mins"] = opts.Timeout
 	}
 
+	if opts.Tags != nil {
+		s["tags"] = strings.Join(opts.Tags, ",")
+	}
 	return s, nil
 }
 
@@ -197,12 +203,12 @@
 		s["parameters"] = opts.Parameters
 	}
 
-	if opts.Timeout == 0 {
-		return nil, errors.New("Required field 'Timeout' not provided.")
+	if opts.Timeout != 0 {
+		s["timeout"] = opts.Timeout
 	}
 	s["timeout_mins"] = opts.Timeout
 
-	return map[string]interface{}{"stack": s}, nil
+	return s, nil
 }
 
 // Adopt accepts an AdoptOpts struct and creates a new stack using the resources
@@ -329,6 +335,8 @@
 	Parameters map[string]string
 	// (OPTIONAL) The timeout for stack creation in minutes.
 	Timeout int
+	// (OPTIONAL) A list of tags to assosciate with the Stack
+	Tags []string
 }
 
 // ToStackUpdateMap casts a CreateOpts struct to a map.
@@ -359,6 +367,10 @@
 		s["timeout_mins"] = opts.Timeout
 	}
 
+	if opts.Tags != nil {
+		s["tags"] = strings.Join(opts.Tags, ",")
+	}
+
 	return s, nil
 }
 
diff --git a/openstack/orchestration/v1/stacks/requests_test.go b/openstack/orchestration/v1/stacks/requests_test.go
index 1e32ca2..1606d98 100644
--- a/openstack/orchestration/v1/stacks/requests_test.go
+++ b/openstack/orchestration/v1/stacks/requests_test.go
@@ -215,3 +215,15 @@
 	expected := PreviewExpected
 	th.AssertDeepEquals(t, expected, actual)
 }
+
+func TestAbandonStack(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	HandleAbandonSuccessfully(t, AbandonOutput)
+
+	actual, err := Abandon(fake.ServiceClient(), "postman_stack", "16ef0584-4458-41eb-87c8-0dc8d5f66c8").Extract()
+	th.AssertNoErr(t, err)
+
+	expected := AbandonExpected
+	th.AssertDeepEquals(t, expected, actual)
+}
diff --git a/openstack/orchestration/v1/stacks/results.go b/openstack/orchestration/v1/stacks/results.go
index dca06e4..432bc8e 100644
--- a/openstack/orchestration/v1/stacks/results.go
+++ b/openstack/orchestration/v1/stacks/results.go
@@ -69,6 +69,7 @@
 	Name         string             `mapstructure:"stack_name"`
 	Status       string             `mapstructure:"stack_status"`
 	StatusReason string             `mapstructure:"stack_status_reason"`
+	Tags         []string           `mapstructure:"tags"`
 	UpdatedTime  time.Time          `mapstructure:"-"`
 }
 
@@ -81,7 +82,7 @@
 		Stacks []ListedStack `mapstructure:"stacks"`
 	}
 
-	err := mapstructure.Decode(page.(StackPage).Body, &res)
+	err := mapstructure.Decode(casted, &res)
 	if err != nil {
 		return nil, err
 	}
@@ -133,6 +134,7 @@
 	Name                string                   `mapstructure:"stack_name"`
 	Status              string                   `mapstructure:"stack_status"`
 	StatusReason        string                   `mapstructure:"stack_status_reason"`
+	Tags                []string                 `mapstructure:"tags"`
 	TemplateDescription string                   `mapstructure:"template_description"`
 	Timeout             int                      `mapstructure:"timeout_mins"`
 	UpdatedTime         time.Time                `mapstructure:"-"`
@@ -200,21 +202,19 @@
 
 // PreviewedStack represents the result of a Preview operation.
 type PreviewedStack struct {
-	Capabilities        []interface{}            `mapstructure:"capabilities"`
-	CreationTime        time.Time                `mapstructure:"-"`
-	Description         string                   `mapstructure:"description"`
-	DisableRollback     bool                     `mapstructure:"disable_rollback"`
-	ID                  string                   `mapstructure:"id"`
-	Links               []gophercloud.Link       `mapstructure:"links"`
-	Name                string                   `mapstructure:"stack_name"`
-	NotificationTopics  []interface{}            `mapstructure:"notification_topics"`
-	Parameters          map[string]string        `mapstructure:"parameters"`
-	Resources           []map[string]interface{} `mapstructure:"resources"`
-	Status              string                   `mapstructure:"stack_status"`
-	StatusReason        string                   `mapstructure:"stack_status_reason"`
-	TemplateDescription string                   `mapstructure:"template_description"`
-	Timeout             int                      `mapstructure:"timeout_mins"`
-	UpdatedTime         time.Time                `mapstructure:"-"`
+	Capabilities        []interface{}      `mapstructure:"capabilities"`
+	CreationTime        time.Time          `mapstructure:"-"`
+	Description         string             `mapstructure:"description"`
+	DisableRollback     bool               `mapstructure:"disable_rollback"`
+	ID                  string             `mapstructure:"id"`
+	Links               []gophercloud.Link `mapstructure:"links"`
+	Name                string             `mapstructure:"stack_name"`
+	NotificationTopics  []interface{}      `mapstructure:"notification_topics"`
+	Parameters          map[string]string  `mapstructure:"parameters"`
+	Resources           []interface{}      `mapstructure:"resources"`
+	TemplateDescription string             `mapstructure:"template_description"`
+	Timeout             int                `mapstructure:"timeout_mins"`
+	UpdatedTime         time.Time          `mapstructure:"-"`
 }
 
 // PreviewResult represents the result of a Preview operation.
@@ -269,12 +269,16 @@
 
 // AbandonedStack represents the result of an Abandon operation.
 type AbandonedStack struct {
-	Status    string                 `mapstructure:"status"`
-	Name      string                 `mapstructure:"name"`
-	Template  map[string]interface{} `mapstructure:"template"`
-	Action    string                 `mapstructure:"action"`
-	ID        string                 `mapstructure:"id"`
-	Resources map[string]interface{} `mapstructure:"resources"`
+	Status             string                 `mapstructure:"status"`
+	Name               string                 `mapstructure:"name"`
+	Template           map[string]interface{} `mapstructure:"template"`
+	Action             string                 `mapstructure:"action"`
+	ID                 string                 `mapstructure:"id"`
+	Resources          map[string]interface{} `mapstructure:"resources"`
+	Files              map[string]string      `mapstructure:"files"`
+	StackUserProjectID string                 `mapstructure:"stack_user_project_id"`
+	ProjectID          string                 `mapstructure:"project_id"`
+	Environment        map[string]interface{} `mapstructure:"environment"`
 }
 
 // AbandonResult represents the result of an Abandon operation.