Comment 5 for bug 1565928

Reviewed: https://review.openstack.org/343827
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=dda9aa730bae0974e52f0f2cea3da352b02199fc
Submitter: Jenkins
Branch: master

commit dda9aa730bae0974e52f0f2cea3da352b02199fc
Author: Peter Stachowski <email address hidden>
Date: Mon Jul 18 17:27:36 2016 +0000

    Remove times.dbm file for each tox run

    If you run the py27 tox tests then attempt to run the py34 tests,
    the following error will occur:

        py34 runtests: commands[0] | ostestr
        --blacklist_file=blacklist-py3.txt
        db type could not be determined
        running=${PYTHON:-python} -m subunit.run discover
        ./trove/tests/unittests --list
        The test run didn't actually run any tests

    This happens because the apparently the times.dbm file generated
    by py27 is not compatible with py34. The converse is not true though -
    if you run py34 first, py27 will work.

    The work-around is to delete the file, which is what is now done
    before running every tox test. Once the bug has been fixed, the
    work-around can be removed.

    This was originally noticed in python-troveclient, however it
    also manifests in the Trove project.

    coverage.xml was also added to the .gitignore file as it
    was appearing in the git list of modified files.

    Change-Id: I312b3879c764b7b803d35e0bb62f0f47291f6693
    Closes-Bug: #1565928