Add support for backdoor_port to be returned with a rpc call.

This adds an rpc call for compute and network that will return
the eventlet_backdoor port for the service.

Change-Id: I95fdb5ca9bce9f3128300e3b5601fb2b2fc5e82f
Signed-off-by: Matthew Treinish <treinish@linux.vnet.ibm.com>

nova/manager.py

@@ -140,6 +140,7 @@ class Manager(base.Base):
             host = CONF.host
         self.host = host
         self.load_plugins()
+        self.backdoor_port = None
         super(Manager, self).__init__(db_driver)
 
     def load_plugins(self):