A patch for the failure on creating an endpoint

endpoint_validation.patch

diff --git kuryr/controllers.py kuryr/controllers.py
index 927f66d..26ef490 100644
--- kuryr/controllers.py
+++ kuryr/controllers.py
@@ -422,7 +422,7 @@ def network_driver_create_endpoint():
         })
     else:
         neutron_network_id = filtered_networks[0]['id']
-        interface = json_data['Interface']
+        interface = json_data['Interface'] or {}
         response_interface = _create_subnets_and_or_port(
             interface, neutron_network_id, endpoint_id)
 
diff --git kuryr/schemata/commons.py kuryr/schemata/commons.py
index 487b05d..a24319d 100644
--- kuryr/schemata/commons.py
+++ kuryr/schemata/commons.py
@@ -76,7 +76,7 @@ COMMONS = {
                     u'$ref': u'#/definitions/commons/definitions/cidr'
                 }
             },
-            u'type': u'object',
+            u'type': [u'object', u'null'],
             u'description': u'Interface used in requests against Endpoints.',
             u'example': {
                 u'AddressIPv6': u'fe80::f816:3eff:fe20:57c3/64',