Merge "BUG-2448 : added more defensive lookup to node & link attributes"

diff --cc bgp/topology-provider/src/main/java/org/opendaylight/bgpcep/bgp/topology/provider/LinkstateTopologyBuilder.java
index 86dffbe0a7573e1fd332be918588441366be04b6,355f5015434c2816771e51f89293383e0dc2243b..9dfb6715aef966b4dcfcc15ae6bb41269b59c29d
--- 1/bgp/topology-provider/src/main/java/org/opendaylight/bgpcep/bgp/topology/provider/LinkstateTopologyBuilder.java
--- 2/bgp/topology-provider/src/main/java/org/opendaylight/bgpcep/bgp/topology/provider/LinkstateTopologyBuilder.java
+++ b/bgp/topology-provider/src/main/java/org/opendaylight/bgpcep/bgp/topology/provider/LinkstateTopologyBuilder.java
@@@ -482,6 -497,6 +497,8 @@@ public final class LinkstateTopologyBui
              break;
          default:
              break;
++        default:
++            break;
          }
  
          final LinkBuilder lb = new LinkBuilder();