Chaning github repository to our gerrit repository

Change-Id: I51ff03d516eecf00a659bade8e15802debfffc5e
diff --git a/testing/params_test.go b/testing/params_test.go
index 937ff8b..30a7109 100644
--- a/testing/params_test.go
+++ b/testing/params_test.go
@@ -6,7 +6,7 @@
 	"testing"
 
 	"github.com/gophercloud/gophercloud"
-	th "github.com/gophercloud/gophercloud/testhelper"
+	th "gerrit.mcp.mirantis.net/debian/gophercloud.git/testhelper"
 )
 
 func TestMaybeString(t *testing.T) {