Cisco plugin (grizzly) does not pass proper args.

Fixes bug 1213147

The Cisco plugin in grizzly does not pass proper arguments to
the enable_vlan_on_trunk_int() method in cisco_nexus_network_driver_v2.
The definition calls for 4 arguments (not counting self):

    def enable_vlan_on_trunk_int(self, mgr, nexus_switch,
                                 interface, vlanid)

but the call in the nexus driver passes only 3 arguments:

    self._client.enable_vlan_on_trunk_int(man,
                                          port_id,
                                          vlan_id)

Change-Id: Ie51affe692151a2ac92f22450e2e70b1005f3507

quantum/plugins/cisco/nexus/cisco_nexus_plugin_v2.py

@@ -116,6 +116,7 @@ def create_network(self, tenant_id, net_name, net_id, vlan_name, vlan_id,
                                                 _nexus_username,
                                                 _nexus_password)
                 self._client.enable_vlan_on_trunk_int(man,
+                                                      _nexus_ip,
                                                       port_id,
                                                       vlan_id)