Comment 3 for bug 1547180

Reviewed: https://review.openstack.org/377913
Committed: https://git.openstack.org/cgit/openstack/git-upstream/commit/?id=79b31d95d18f9be5806c94f87823588014a7cdf3
Submitter: Jenkins
Branch: master

commit 79b31d95d18f9be5806c94f87823588014a7cdf3
Author: Darragh Bailey <email address hidden>
Date: Tue Sep 27 16:35:24 2016 +0100

    Refactor test to allow additional

    Adjust unit test checking to make way for additional tests to be added
    to the same class while ensuring can verify the resulting tree while
    different commit messages may be recorded.

    Ensure separate parser is created for each test to prevent ensure the
    'search_refs' option is isolated per test scenario as otherwise each
    scenario will append entries as it is set on the class.

    These lay the ground work to adding tests to check that git-upstream
    can work with SHA1 and tags as inputs in addition to branches.

    Change-Id: I46a27281f3f0c01848a388ad05302599f4eff1c9
    Related-Bug: #1547180