The Shipyard API docs and shipyard_api_client incorrectly reference
the wrong API endpoints for some APIs. This commit updates the API
docs to reference the correct API endpoints for:
- getting action validation details
- triggering a control action against an activity
The following is updated in the shipyard_api_client.py:
- API endpoint for getting action validation details
Change-Id: I04b770acfd64f331efce6f83f51cb41d0818a6b2