VOL-1900 lint warning fixes tests

Change-Id: Ic309e11913134cf559fd80cefcf5ded815bb52dc
diff --git a/tests/core/api/grpc_nbi_api_handler_client_test.go b/tests/core/api/grpc_nbi_api_handler_client_test.go
index 148b664..17ad4b9 100644
--- a/tests/core/api/grpc_nbi_api_handler_client_test.go
+++ b/tests/core/api/grpc_nbi_api_handler_client_test.go
@@ -21,6 +21,12 @@
 import (
 	"context"
 	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"testing"
+	"time"
+
 	"github.com/golang/protobuf/ptypes/empty"
 	com "github.com/opencord/voltha-lib-go/v2/pkg/adapters/common"
 	"github.com/opencord/voltha-lib-go/v2/pkg/log"
@@ -32,11 +38,6 @@
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
-	"os"
-	"os/exec"
-	"strings"
-	"testing"
-	"time"
 )
 
 var conn *grpc.ClientConn