behaviour: return correct reason in MessageOutOfOrder (#3772)

CHANGELOG_PENDING.md

@@ -37,3 +37,5 @@ program](https://hackerone.com/tendermint).
 ### BUG FIXES:
 - [p2p] \#3338 Prevent "sent next PEX request too soon" errors by not calling
   ensurePeers outside of ensurePeersRoutine
+- [behaviour] Return correct reason in MessageOutOfOrder (@jim380)
+  

behaviour/peer_behaviour.go

@@ -27,7 +27,7 @@ type messageOutOfOrder struct {
 
 // MessageOutOfOrder returns a messagOutOfOrder PeerBehaviour.
 func MessageOutOfOrder(peerID p2p.ID, explanation string) PeerBehaviour {
-	return PeerBehaviour{peerID: peerID, reason: badMessage{explanation}}
+	return PeerBehaviour{peerID: peerID, reason: messageOutOfOrder{explanation}}
 }
 
 type consensusVote struct {