Correcting 'id' type in compute schema

This patch corrects the type of 'id' in compute schema
/tempest/api_schema/compute/.
Many place 'id' is defined as both 'string' and 'integer' but not all
APIs return 'id' in both format.

For example, servers APIs always return 'server id' as UUID so those
should be defined as 'string' only not {'string', 'integer'} both.
Same applies for other 'id' like in flavor, Image API's response.

Below are the correct type of 'id'-
  Server's id – String
  Image id – String
  Flavor id - String
  key-pair API- > user_id – String
  Agent id – Integer
  Service id - Integer

Partially implements blueprint nova-api-attribute-test

Change-Id: Ifdde2ddd56d600f968d02356aaec0c56e5c3767f
diff --git a/tempest/api_schema/compute/agents.py b/tempest/api_schema/compute/agents.py
index b04cf64..58ade10 100644
--- a/tempest/api_schema/compute/agents.py
+++ b/tempest/api_schema/compute/agents.py
@@ -22,7 +22,7 @@
                 'items': {
                     'type': 'object',
                     'properties': {
-                        'agent_id': {'type': ['integer', 'string']},
+                        'agent_id': {'type': 'integer'},
                         'hypervisor': {'type': 'string'},
                         'os': {'type': 'string'},
                         'architecture': {'type': 'string'},
diff --git a/tempest/api_schema/compute/keypairs.py b/tempest/api_schema/compute/keypairs.py
index b8f905f..2ae410c 100644
--- a/tempest/api_schema/compute/keypairs.py
+++ b/tempest/api_schema/compute/keypairs.py
@@ -49,10 +49,7 @@
                 'fingerprint': {'type': 'string'},
                 'name': {'type': 'string'},
                 'public_key': {'type': 'string'},
-                # NOTE: Now the type of 'user_id' is integer, but here
-                # allows 'string' also because we will be able to change
-                # it to 'uuid' in the future.
-                'user_id': {'type': ['integer', 'string']},
+                'user_id': {'type': 'string'},
                 'private_key': {'type': 'string'}
             },
             # When create keypair API is being called with 'Public key'
diff --git a/tempest/api_schema/compute/migrations.py b/tempest/api_schema/compute/migrations.py
index 6723869..6549272 100644
--- a/tempest/api_schema/compute/migrations.py
+++ b/tempest/api_schema/compute/migrations.py
@@ -22,10 +22,7 @@
                 'items': {
                     'type': 'object',
                     'properties': {
-                        # NOTE: Now the type of 'id' is integer, but here
-                        # allows 'string' also because we will be able to
-                        # change it to 'uuid' in the future.
-                        'id': {'type': ['integer', 'string']},
+                        'id': {'type': 'integer'},
                         'status': {'type': 'string'},
                         'instance_uuid': {'type': 'string'},
                         'source_node': {'type': 'string'},
@@ -33,12 +30,8 @@
                         'dest_node': {'type': 'string'},
                         'dest_compute': {'type': 'string'},
                         'dest_host': {'type': 'string'},
-                        'old_instance_type_id': {
-                            'type': ['integer', 'string']
-                        },
-                        'new_instance_type_id': {
-                            'type': ['integer', 'string']
-                        },
+                        'old_instance_type_id': {'type': 'integer'},
+                        'new_instance_type_id': {'type': 'integer'},
                         'created_at': {'type': 'string'},
                         'updated_at': {'type': ['string', 'null']}
                     },
diff --git a/tempest/api_schema/compute/servers.py b/tempest/api_schema/compute/servers.py
index ca1f5aa..8e2a778 100644
--- a/tempest/api_schema/compute/servers.py
+++ b/tempest/api_schema/compute/servers.py
@@ -56,13 +56,13 @@
             'server': {
                 'type': 'object',
                 'properties': {
-                    'id': {'type': ['integer', 'string']},
+                    'id': {'type': 'string'},
                     'name': {'type': 'string'},
                     'status': {'type': 'string'},
                     'image': {
                         'type': 'object',
                         'properties': {
-                            'id': {'type': ['integer', 'string']},
+                            'id': {'type': 'string'},
                             'links': parameter_types.links
                         },
                         'required': ['id', 'links']
@@ -70,7 +70,7 @@
                     'flavor': {
                         'type': 'object',
                         'properties': {
-                            'id': {'type': ['integer', 'string']},
+                            'id': {'type': 'string'},
                             'links': parameter_types.links
                         },
                         'required': ['id', 'links']
diff --git a/tempest/api_schema/compute/services.py b/tempest/api_schema/compute/services.py
index 4c58013..eaba129 100644
--- a/tempest/api_schema/compute/services.py
+++ b/tempest/api_schema/compute/services.py
@@ -22,10 +22,7 @@
                 'items': {
                     'type': 'object',
                     'properties': {
-                        # NOTE: Now the type of 'id' is integer, but here
-                        # allows 'string' also because we will be able to
-                        # change it to 'uuid' in the future.
-                        'id': {'type': ['integer', 'string']},
+                        'id': {'type': 'integer'},
                         'zone': {'type': 'string'},
                         'host': {'type': 'string'},
                         'state': {'type': 'string'},
diff --git a/tempest/api_schema/compute/v2/floating_ips.py b/tempest/api_schema/compute/v2/floating_ips.py
index 3ea6320..5bb6b94 100644
--- a/tempest/api_schema/compute/v2/floating_ips.py
+++ b/tempest/api_schema/compute/v2/floating_ips.py
@@ -27,7 +27,7 @@
                         # able to change it to 'uuid' in the future.
                         'id': {'type': ['integer', 'string']},
                         'pool': {'type': ['string', 'null']},
-                        'instance_id': {'type': ['integer', 'string', 'null']},
+                        'instance_id': {'type': ['string', 'null']},
                         'ip': {
                             'type': 'string',
                             'format': 'ip-address'
@@ -58,7 +58,7 @@
                     # 'uuid' in the future.
                     'id': {'type': ['integer', 'string']},
                     'pool': {'type': ['string', 'null']},
-                    'instance_id': {'type': ['integer', 'string', 'null']},
+                    'instance_id': {'type': ['string', 'null']},
                     'ip': {
                         'type': 'string',
                         'format': 'ip-address'
diff --git a/tempest/api_schema/compute/v2/images.py b/tempest/api_schema/compute/v2/images.py
index d121060..90737a2 100644
--- a/tempest/api_schema/compute/v2/images.py
+++ b/tempest/api_schema/compute/v2/images.py
@@ -30,10 +30,7 @@
         'server': {
             'type': 'object',
             'properties': {
-                # NOTE: Now the type of 'id' is integer, but here
-                # allows 'string' also because we will be able to
-                # change it to 'uuid' in the future.
-                'id': {'type': ['integer', 'string']},
+                'id': {'type': 'string'},
                 'links': parameter_types.links
             },
             'required': ['id', 'links']
diff --git a/tempest/api_schema/compute/v2/keypairs.py b/tempest/api_schema/compute/v2/keypairs.py
index 9a025c3..32d8cca 100644
--- a/tempest/api_schema/compute/v2/keypairs.py
+++ b/tempest/api_schema/compute/v2/keypairs.py
@@ -25,10 +25,7 @@
                     'public_key': {'type': 'string'},
                     'name': {'type': 'string'},
                     'fingerprint': {'type': 'string'},
-                    # NOTE: Now the type of 'user_id' is integer, but here
-                    # allows 'string' also because we will be able to change
-                    # it to 'uuid' in the future.
-                    'user_id': {'type': ['integer', 'string']},
+                    'user_id': {'type': 'string'},
                     'deleted': {'type': 'boolean'},
                     'created_at': {'type': 'string'},
                     'updated_at': {'type': ['string', 'null']},
diff --git a/tempest/api_schema/compute/v2/servers.py b/tempest/api_schema/compute/v2/servers.py
index 981d8f7..afcceac 100644
--- a/tempest/api_schema/compute/v2/servers.py
+++ b/tempest/api_schema/compute/v2/servers.py
@@ -25,10 +25,7 @@
             'server': {
                 'type': 'object',
                 'properties': {
-                    # NOTE: Now the type of 'id' is uuid, but here allows
-                    # 'integer' also because old OpenStack uses 'integer'
-                    # as a server id.
-                    'id': {'type': ['integer', 'string']},
+                    'id': {'type': 'string'},
                     'security_groups': {'type': 'array'},
                     'links': parameter_types.links,
                     'adminPass': {'type': 'string'},
diff --git a/tempest/api_schema/compute/v2/volumes.py b/tempest/api_schema/compute/v2/volumes.py
index 84a659c..1af951f 100644
--- a/tempest/api_schema/compute/v2/volumes.py
+++ b/tempest/api_schema/compute/v2/volumes.py
@@ -38,7 +38,7 @@
                                 'id': {'type': 'string'},
                                 'device': {'type': 'string'},
                                 'volumeId': {'type': 'string'},
-                                'serverId': {'type': ['integer', 'string']}
+                                'serverId': {'type': 'string'}
                             }
                             # NOTE- If volume is not attached to any server
                             # then, 'attachments' attributes comes as array
@@ -86,7 +86,7 @@
                                     'id': {'type': 'string'},
                                     'device': {'type': 'string'},
                                     'volumeId': {'type': 'string'},
-                                    'serverId': {'type': ['integer', 'string']}
+                                    'serverId': {'type': 'string'}
                                 }
                                 # NOTE- If volume is not attached to any server
                                 # then, 'attachments' attributes comes as array
diff --git a/tempest/api_schema/compute/v3/servers.py b/tempest/api_schema/compute/v3/servers.py
index 6716249..308f744 100644
--- a/tempest/api_schema/compute/v3/servers.py
+++ b/tempest/api_schema/compute/v3/servers.py
@@ -25,10 +25,7 @@
             'server': {
                 'type': 'object',
                 'properties': {
-                    # NOTE: Now the type of 'id' is uuid, but here allows
-                    # 'integer' also because old OpenStack uses 'integer'
-                    # as a server id.
-                    'id': {'type': ['integer', 'string']},
+                    'id': {'type': 'string'},
                     'os-security-groups:security_groups': {'type': 'array'},
                     'links': parameter_types.links,
                     'admin_password': {'type': 'string'},