SONAR suggestion - explicit break in switch statements

Change-Id: Ib648192fe84f37947936592c4635397706b14377
diff --git a/apps/l3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/impl/NetL3VpnManager.java b/apps/l3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/impl/NetL3VpnManager.java
index 45e9f9b..b7d4ddd 100644
--- a/apps/l3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/impl/NetL3VpnManager.java
+++ b/apps/l3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/impl/NetL3VpnManager.java
@@ -1094,6 +1094,7 @@
                                          .leaderNodeId());
                         leaderChanged(false);
                     }
+                    break;
                 default:
                     break;
             }