ONOS-5970 Added CLIs to purge and sync network states from Neutron

Change-Id: Icd1f4c174de20e261229f30ddfd6857c26cb038c
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/DistributedOpenstackRouterStore.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/DistributedOpenstackRouterStore.java
index 3262969..aab6fa3 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/DistributedOpenstackRouterStore.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/DistributedOpenstackRouterStore.java
@@ -258,6 +258,13 @@
         return ImmutableSet.copyOf(osFloatingIps);
     }
 
+    @Override
+    public void clear() {
+        osFloatingIpStore.clear();
+        osRouterInterfaceStore.clear();
+        osRouterStore.clear();
+    }
+
     private class OpenstackRouterMapListener implements MapEventListener<String, Router> {
 
         @Override