Fix missing registration for acc-br

DropLog config requires registration for ExtraConfig for both bridges

Signed-off-by: Kiran Shastri <shastrinator@gmail.com>
Change-Id: I7b1b61013c9a5aa91f90aacceb731dffc4a31940

Author: shastrinator

agent-ovs/ovs/AccessFlowManager.cpp

@@ -97,6 +97,7 @@ void AccessFlowManager::start() {
     agent.getEndpointManager().registerListener(this);
     agent.getLearningBridgeManager().registerListener(this);
     agent.getPolicyManager().registerListener(this);
+    agent.getExtraConfigManager().registerListener(this);
 
     for (size_t i = 0; i < sizeof(ID_NAMESPACES)/sizeof(char*); i++) {
         idGen.initNamespace(ID_NAMESPACES[i]);

agent-ovs/ovs/include/AccessFlowManager.h

@@ -16,6 +16,7 @@
 #include <opflexagent/Agent.h>
 #include <opflexagent/EndpointManager.h>
 #include <opflexagent/PolicyListener.h>
+#include <opflexagent/ExtraConfigListener.h>
 #include "PortMapper.h"
 #include "SwitchManager.h"
 #include <opflexagent/TaskQueue.h>
@@ -34,6 +35,7 @@ class AccessFlowManager : public EndpointListener,
                           public PortStatusListener,
                           public PolicyListener,
                           public SwitchStateHandler,
+                          public ExtraConfigListener,
                           private boost::noncopyable {
 public:
     /**