Fixes to clear augmentedmap and external peer router map in case of purging state.

Change-Id: I66223dc59c80be775b8bf5be10f3770530b1fc7b
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackNetworkManager.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackNetworkManager.java
index e5301e5..d3e36bf 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackNetworkManager.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackNetworkManager.java
@@ -339,6 +339,8 @@
     @Override
     public void clear() {
         osNetworkStore.clear();
+        augmentedNetworkMap.clear();
+        externalPeerRouterMap.clear();
     }
 
     @Override