This adds integration testing to gerritlib with jeepyb and gerrit.
Depends-On: https://review.opendev.org/704660
Change-Id: I1815e63693656d52c10a9cb9bf60f999e036dfed
Add a setup.py for the gerritlib project. This incorporates
openstack.common.setup/version as well for versioning. This change
also adds a tox.ini file and its lists of dependencies to gerritlib.
This was not done in a separate commit as tox depends on setup.py and
setup depends on tox for gate tests.
Change-Id: I101471e836802b1c38796d8d3c570ce5f00c793e