Dequeue changes that depend on a dequeued change.

If a series of dependent changes are in the queue and one of them
fails tests and is dequeued, dequeue any changes behind it that
depend on it since they can't merge.

Change-Id: Iffe7964c2e76bc1649f14b62bf4b3fc391a8c8cb
Reviewed-on: https://review.openstack.org/11820
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins
3 files changed