Make parameters in EndpointManager optional

Change adminurl and internalurl parameters in EndpointManager create()
to optional parameters.

Change-Id: I490e35b89f7ae7c6cdbced6ba8d3b82d5132c19d
Closes-Bug: #1318436

keystoneclient/v2_0/endpoints.py

@@ -31,7 +31,8 @@ class EndpointManager(base.ManagerWithFind):
         """List all available endpoints."""
         return self._list('/endpoints', 'endpoints')
 
-    def create(self, region, service_id, publicurl, adminurl, internalurl):
+    def create(self, region, service_id, publicurl, adminurl=None,
+               internalurl=None):
         """Create a new endpoint."""
         body = {'endpoint': {'region': region,
                              'service_id': service_id,