fix for neutron-cli "lbaas-listener-create" failure

neutron-plugin(loadbalancer) code uses the "listener"
as the resource_type rather than using "loadbalancer-listener"
as the resource_type which causes the issue.

Corrected the resource_type.

Change-Id: I94ece732a9a11f441f7d947d2a204720bf256537
Closes-bug: 1628607

neutron_plugin_contrail/plugins/opencontrail/loadbalancer/v2/listener.py

@@ -119,8 +119,8 @@ def create(self, context, listener):
             lb = None
 
         obj_uuid = uuidutils.generate_uuid()
-        name = self._get_resource_name('listener', project,
-                                       l['name'], obj_uuid)
+        name = self._get_resource_name('loadbalancer-listener',
+                                       project, l['name'], obj_uuid)
         id_perms = IdPermsType(enable=True, description=l['description'])
         ll = LoadbalancerListener(name, project, id_perms=id_perms,
                                   display_name=l['name'])