[FAB-6194] stop log stacktrace for stateinfo check

Currently while doing validation of state info message there is a long
stack trace printed which is misleading. This commit takes care to stop
printing the stack trace.

Change-Id: Ibb3570514d42f446ce2586f834fa7b02800fb003
Signed-off-by: Artem Barger <bartem@il.ibm.com>

gossip/gossip/gossip_impl.go

@@ -427,7 +427,7 @@ func (g *gossipServiceImpl) validateMsg(msg proto.ReceivedMessage) bool {
 
 	if msg.GetGossipMessage().IsStateInfoMsg() {
 		if err := g.validateStateInfoMsg(msg.GetGossipMessage()); err != nil {
-			g.logger.Warningf("StateInfo message %v is found invalid: %+v", msg, err)
+			g.logger.Warningf("StateInfo message %v is found invalid: %v", msg, err)
 			return false
 		}
 	}