Fix unit test in dataservice (#5745)

After a unit test, the msg stream will be closed. But in pulsar go
client, the connection between client and server will be reconnected.
Then we rebuild the msgstream immediately and produce a message, this
message will be sent to the previous connection which cause timeout of
test. We append the channelName wil a random value.

Signed-off-by: sunby <bingyi.sun@zilliz.com>

internal/dataservice/server_test.go

@@ -13,9 +13,12 @@ import (
 	"context"
 	"math"
 	"path"
+	"strconv"
 	"testing"
 	"time"
 
+	"math/rand"
+
 	"github.com/milvus-io/milvus/internal/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
@@ -831,6 +834,8 @@ func TestGetRecoveryInfo(t *testing.T) {
 
 func newTestServer(t *testing.T, receiveCh chan interface{}) *Server {
 	Params.Init()
+	Params.TimeTickChannelName += strconv.Itoa(rand.Int())
+	Params.StatisticsChannelName += strconv.Itoa(rand.Int())
 	var err error
 	factory := msgstream.NewPmsFactory()
 	m := map[string]interface{}{