tree fed1acf9b35cdc8c2159aba9279585f7dfd58f10
parent 597e7c4c85f0955bbd3968ad1d2c96d8ed6acdf1
author James E. Blair <jeblair@hp.com> 1342651181 -0700
committer Jenkins <jenkins@review.openstack.org> 1345155986 +0000

Add merging capability.

Add git repo management and merging.  When collecting changes to
be tested together, merge or cherry-pick those changes into the
zuul-managed repos, and create a unique ref for that configuration.
Pass the ref to Jenkins instead of the string description of the
changes, so that Jenkins only needs to checkout that one ref.
This moves the complexity of merging and managing multiple commits
out of Jenkins and into Zuul.

The GERRIT_CHANGES variable is deprecated (along with the rest of
the GERRIT_* variables) and will be removed in a future patch
(which will contain a documentation update).

Change-Id: I126c9030223c07a30f7092e2273ebd7605d9f3df
Reviewed-on: https://review.openstack.org/11349
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins