Fully functional cassandane with fewer patches.
    
    Working with upstream I got some fixes pushed and found out about a
    couple of other tricks.
    
    Was able to drop some patches and now cassandane runs 603 tests
    successfully.  The only tests excluded now are those which are expected
    to fail with 3.0.1, and five coredump tests which would require removal
    of systemd coredump redirection in order to be useful.