fix go test error

Signed-off-by: Leo Chen <leo@harmony.one>

node/node.go

@@ -319,6 +319,7 @@ func New(host p2p.Host, consensus *bft.Consensus, db ethdb.Database) *Node {
 
 	if consensus != nil && consensus.IsLeader {
 		node.State = NodeLeader
+		go node.ReceiveClientGroupMessage()
 	} else {
 		node.State = NodeInit
 	}
@@ -333,11 +334,6 @@ func New(host p2p.Host, consensus *bft.Consensus, db ethdb.Database) *Node {
 	// start the goroutine to receive group message
 	go node.ReceiveGroupMessage()
 
-	// only start the goroutine for leader
-	if consensus.IsLeader {
-		go node.ReceiveClientGroupMessage()
-	}
-
 	node.duplicatedPing = make(map[string]bool)
 
 	if utils.UseLibP2P {