Fixing import for flow/test

Changed flogo-lib/flow/test import to github.com/TIBCOSoftware/flogo-contrib/action/flow/test

Author: mellistibco

docs/docs/create-activity.md

@@ -126,7 +126,7 @@ import (
 	"testing"
 
 	"github.com/TIBCOSoftware/flogo-lib/core/activity"
-	"github.com/TIBCOSoftware/flogo-lib/flow/test"
+	"github.com/TIBCOSoftware/flogo-contrib/action/flow/test"
 )
 
 var activityMetadata *activity.Metadata
@@ -197,4 +197,4 @@ To add the new activity to a Flogo engine and use it in a flow you can import it
 
 ```bash
 flogo install https://github.com/user/activity
-```
+```