Updated openstack/openstack
Project: openstack/neutron  575cbce59f16389368dcdbd4d32f8b3a15f9019e

Introduce RpcCallback class

This class will be used to create proper self.target with appropriate
API version once we migrate to oslo.messaging.

blueprint oslo-messaging

Change-Id: I1fb5eb0aaac0d115fd84630e58b333e695ad4f5f