wsk trigger create/delete with a feed shows the result of the feed activation

@rabbah commented on [Tue May 16 2017](https://github.com/apache/incubator-openwhisk/issues/2249)

create a trigger with a feed
```
> wsk trigger create t --feed cloudant/changes
ok: invoked /_/cloudant/changes with id xyz
{
"activationId": "xyz",
"response": {
"result": {},
"status": "success",
"success": true
},...
}
ok: created trigger myCloudantTrigger
```

then delete it:
```
> wsk trigger delete t
ok: invoked /.../changes with id xyz
{
"activationId": "xyz",
"response": {
"result": {},
"status": "success",
"success": true
}, ...
}
ok: deleted trigger t
```

is it intentional to show the feed action activation?

---

@mdeuser commented on [Thu May 18 2017](https://github.com/apache/incubator-openwhisk/issues/2249#issuecomment-302471765)

@dubeejw - was this the desired behavior? this additional output comes from invoking the action invoke cli command method under the covers. calling the lower level action invoke method would avoid displaying the action invocation output.