Ticket 49055 - Refactor create_test.py
    
    Description: Now create_test.py works considering new
    changes in tickets, suites and topology fixtures.
    - If you choose a topology that already exists, create_test.py will just
    import the suitable fixture.
    - And if you choose a non existing topology, create_test.py will make it
    for you. So you can move it to lib389/topologies.py later.
    
    Also, remove dirsrvtests/cmd dir, because it conflicts with another
    Python module and lib389 already has this functionality.
    
    https://fedorahosted.org/389/ticket/49055
    
    Reviewed by: wibrown (Thanks!)