Return response status reason on error

Upon server error, return the status reason if the body is empty, to
help debug server issues.

Change-Id: I29aef075081965bb8ecacf45a166ca9dbd4cbb8d
Closes-Bug: #1287110
Updated from global requirements

Change-Id: I35dcfdd24067e6bd37f970d8ab73d416fbe55f96
Merge "Updated from global requirements"
Merge "Return response status reason on error"