VR related periodic jobs are scheduled twice and run twice on management servers

server/src/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java

@@ -606,6 +606,11 @@ public class VpcVirtualNetworkApplianceManagerImpl extends VirtualNetworkApplian
         }
     }
 
+    @Override
+    public boolean start() {
+        return true;
+    }
+
     @Override
     public boolean startSite2SiteVpn(final Site2SiteVpnConnection conn, final VirtualRouter router) throws ResourceUnavailableException {
         if (router.getState() != State.Running) {