use ZUUL_PROJECT for debian git command

Project is passed by Zuul via ZUUL_PROJECT, we do not need to use
'gerrit-name'.

Jobs updated:

lucene-search-2-antbuild
operations-debs-python-voluptuous-debbuild

bug: 53470
Change-Id: I376c8c503c9aa6b4bbfa742447a4437755c6fab1