style: add import formatting

Signed-off-by: Xinwei Xiong(cubxxw-openim) <3293172751nss@gmail.com>

test/mongo/cmd/main.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
+
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 )

test/mongo/mongo_utils.go

@@ -19,10 +19,11 @@ import (
 	server_api_params "Open_IM/pkg/proto/sdk_ws"
 	"context"
 	"fmt"
+	"time"
+
 	"github.com/golang/protobuf/proto"
 	"go.mongodb.org/mongo-driver/mongo"
 	"gopkg.in/mgo.v2/bson"
-	"time"
 )
 
 var (