Feature/filestorage sharenetworks create (#118)

* sfs: Add support for share networks Create

* sfs: Add Manila to acceptance test environment

* sfs: Add acceptance tests for share networks Create

* sfs: Remove unused urls

Some url functions were introduced but they belong to other
PRs. Will be repushed with in the correct PRs

* sfs: Make name and descr required for creating share network

* sfs: Remove required parameters

After taking a close look at the code it appeared that 'name'
and 'description' are not required parameters
diff --git a/acceptance/clients/clients.go b/acceptance/clients/clients.go
index 86871aa..6658200 100644
--- a/acceptance/clients/clients.go
+++ b/acceptance/clients/clients.go
@@ -122,6 +122,25 @@
 	})
 }
 
+// NewSharedFileSystemV2Client returns a *ServiceClient for making calls
+// to the OpenStack Shared File System v2 API. An error will be returned
+// if authentication or client creation was not possible.
+func NewSharedFileSystemV2Client() (*gophercloud.ServiceClient, error) {
+	ao, err := openstack.AuthOptionsFromEnv()
+	if err != nil {
+		return nil, err
+	}
+
+	client, err := openstack.AuthenticatedClient(ao)
+	if err != nil {
+		return nil, err
+	}
+
+	return openstack.NewSharedFileSystemV2(client, gophercloud.EndpointOpts{
+		Region: os.Getenv("OS_REGION_NAME"),
+	})
+}
+
 // NewComputeV2Client returns a *ServiceClient for making calls
 // to the OpenStack Compute v2 API. An error will be returned
 // if authentication or client creation was not possible.