Add port bindings to RPC topics resources

This change adds port bindings to the RPC topics resources. It also
adds the 'activate' and 'deactivate' messages for this resource. This
is done in support of the implementation of multiple port bindings.

Change-Id: I5ed542b7a137338a0878f683decc5dcca7f814de
Partial-Bug: #1580880

neutron_lib/agent/topics.py

@@ -15,12 +15,14 @@
 
 from neutron_lib.api.definitions import network
 from neutron_lib.api.definitions import port
+from neutron_lib.api.definitions import portbindings_extended
 from neutron_lib.api.definitions import subnet
 
 
 NETWORK = network.RESOURCE_NAME
 SUBNET = subnet.RESOURCE_NAME
 PORT = port.RESOURCE_NAME
+PORT_BINDING = portbindings_extended.RESOURCE_NAME
 SECURITY_GROUP = 'security_group'
 L2POPULATION = 'l2population'
 DVR = 'dvr'
@@ -29,6 +31,8 @@ RESOURCES = 'resources'
 CREATE = 'create'
 DELETE = 'delete'
 UPDATE = 'update'
+ACTIVATE = 'activate'
+DEACTIVATE = 'deactivate'
 
 AGENT = 'q-agent-notifier'
 PLUGIN = 'q-plugin'

releasenotes/notes/add-port-bindings-resource-messages-rpc-1382ba9842561cdb.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - New ``PORT_BINDING``, ``ACTIVATE`` and ``DEACTIVATE`` definitions have been
+    added to ``neutron_lib.agent.topics``, to enable plug-ins to notify agents
+    when a port binding has been activated or de-activated.