Override Zuul's LOG_PATH to use ZUUL_REF as unique identifier

Override Zuul's LOG_PATH to use ZUUL_REF as unique identifier
instead of ZUUL_UUID. ZUUL_REF is unique across a job build set
while ZUUL_UUID is unique per job. Uploading based on ZUUL_REF
allows child jobs to find parent jobs artifacts easily.

Note: This requires us to carry a patch [1] that has not yet
      landed upstream.

[1]: https://review.openstack.org/#/c/341154

Change-Id: I52d2e8c3b7c5da5341cdd768efecfdeb5db82ce5
1 file changed
tree: 36accaaa728fd30f10f803d408caa49cb35a3afc
  1. gerrit/
  2. gerritbot/
  3. jobs/
  4. nodepool/
  5. zuul/
  6. .gitreview