Reverts change to create_active_image behavior response

* The create_active_image response was changed during the
  previous refactor to not include the headers from the
  image creation response. I'm reverting that change to
  keep to the original contract

Change-Id: Ia0c2a2c23b152a4c50b90b186d61acdd205d065f
Merge "Reverts change to create_active_image behavior response"