Fix broken method signiture

GET on a network in os-networks API would fail because
of the signiture mismatch. This fixes the issue.

Change-Id: I4865e93a6a2ad26aa4abcc78b1056152c2b59369

nova/network/api.py

@@ -38,7 +38,7 @@ class API(base.Base):
                         FLAGS.network_topic,
                         {'method': 'get_all_networks'})
 
-    def get(self, context, fixed_range, network_uuid):
+    def get(self, context, network_uuid):
         return rpc.call(context,
                         FLAGS.network_topic,
                         {'method': 'get_network',