Update blockstorage v2 API
diff --git a/openstack/blockstorage/v2/extensions/volumeactions/fixtures.go b/openstack/blockstorage/v2/extensions/volumeactions/fixtures.go
new file mode 100644
index 0000000..905d6df
--- /dev/null
+++ b/openstack/blockstorage/v2/extensions/volumeactions/fixtures.go
@@ -0,0 +1,183 @@
+package volumeactions
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	th "github.com/rackspace/gophercloud/testhelper"
+	fake "github.com/rackspace/gophercloud/testhelper/client"
+)
+
+func MockAttachResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-attach":
+    {
+        "mountpoint": "/mnt",
+        "mode": "rw",
+        "instance_uuid": "50902f4f-a974-46a0-85e9-7efc5e22dfdd"
+    }
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}
+
+func MockDetachResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-detach": {}
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}
+
+func MockReserveResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-reserve": {}
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}
+
+func MockUnreserveResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-unreserve": {}
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}
+
+func MockInitializeConnectionResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-initialize_connection":
+    {
+        "connector":
+        {
+        "ip":"127.0.0.1",
+        "host":"stack",
+        "initiator":"iqn.1994-05.com.redhat:17cf566367d2",
+        "multipath": false,
+        "platform": "x86_64",
+        "os_type": "linux2"
+        }
+    }
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{
+"connection_info": {
+    "data": {
+      "target_portals": [
+        "172.31.17.48:3260"
+      ],
+      "auth_method": "CHAP",
+      "auth_username": "5MLtcsTEmNN5jFVcT6ui",
+      "access_mode": "rw",
+      "target_lun": 0,
+      "volume_id": "cd281d77-8217-4830-be95-9528227c105c",
+      "target_luns": [
+        0
+      ],
+      "target_iqns": [
+        "iqn.2010-10.org.openstack:volume-cd281d77-8217-4830-be95-9528227c105c"
+      ],
+      "auth_password": "x854ZY5Re3aCkdNL",
+      "target_discovered": false,
+      "encrypted": false,
+      "qos_specs": null,
+      "target_iqn": "iqn.2010-10.org.openstack:volume-cd281d77-8217-4830-be95-9528227c105c",
+      "target_portal": "172.31.17.48:3260"
+    },
+    "driver_volume_type": "iscsi"
+  }
+            }`)
+		})
+}
+
+func MockTerminateConnectionResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-terminate_connection":
+    {
+        "connector":
+        {
+        "ip":"127.0.0.1",
+        "host":"stack",
+        "initiator":"iqn.1994-05.com.redhat:17cf566367d2",
+        "multipath": false,
+        "platform": "x86_64",
+        "os_type": "linux2"
+        }
+    }
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}