add job for testing that hooks work

this is a simple job that just tests all the hook points. It
should be fast. This is one of the places where we don't test
as part of a normal d-g job, so we should ensure we don't break it.

Change-Id: Ieea3ffd285f3f489df477413018b173b1e54e609
Merge "add job for testing that hooks work"