Updated openstack/openstack
Project: openstack/neutron  2dd54e3843a8f862e3cde0b034829bbddec33281

Convert several uses of RpcCallback

Convert several places in the code that were using the RpcCallback
compatibility class.  This class eased the transition to
oslo.messaging.  This patch drops the usage of this class in favor of
direct usage of the appropriate oslo.messaging API.

Part of blueprint drop-rpc-compat.

Change-Id: I955958e836635d43dabc7b39d050c1418b18cf8f