[ONOS-3801] Implements L3 REST call json parser
- Nullability check for RouterCodec, RoutingInterfaceCodec, RoutingWebResource.
- Copyright fixed.
- externalFixedIps() method in OpenstackExternalGateway class returns the immutable Map.

Change-Id: I841cc1774a074e167ffe327c6e81d3f245cc8ee0
diff --git a/apps/openstackrouting/src/main/java/org/onosproject/openstackrouting/OpenstackIcmpHandler.java b/apps/openstackrouting/src/main/java/org/onosproject/openstackrouting/OpenstackIcmpHandler.java
index 7186903..67c6724 100644
--- a/apps/openstackrouting/src/main/java/org/onosproject/openstackrouting/OpenstackIcmpHandler.java
+++ b/apps/openstackrouting/src/main/java/org/onosproject/openstackrouting/OpenstackIcmpHandler.java
@@ -31,4 +31,4 @@
     public void run() {
 
     }
-}
+}
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