Jeremy Stanley 2e21b966c9 Allow BRANCH instead of ZUUL_REF in ggp
* modules/jenkins/files/slave_scripts/gerrit-git-prep.sh: Allow
callers to supply BRANCH in the environment for cases where there
will be no ZUUL_REF environment variable. This is mainly to support
use in periodic jobs, so that we can transition away from the
Jenkins SCM plug-in.

Change-Id: I86c77695d8c374c94932664026ab7a541686ae74
2014-03-25 21:03:35 +00:00
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