Move test.support and test.script_helper to python2-libs
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1528899
    
    When moving files around, explicit conflicts should be added, however
    the dependency chain here (python2-test requires exact version-release of
    python2, python2 requires exact version-release of python2-libs) prevents
    instalation of python2-libs with greater version-release than python2-test.