The feature notes:

  * Mitaka is now the default OpenStack release configured by this
    profile.  Kilo and Juno are deprecated, and we are no longer testing
    the profile's functionality under those versions (although we have
    no concrete plans to remove the code at this point).  They may
    continue to work, or they may not.  You should update to Mitaka if
    possible, of course.

  * The default topology is now down to two nodes: a controller (`ctl`)
    node and a compute (`cp-1`) node; the networkmanager node's
    functionality has been moved to the controller, as is the default in
    the OpenStack Ubuntu/Apt documentation.  You can return to the old
    three-node configuration by changing the name of the
    "networkmanager" node in the Advanced Parameters from `ctl` to `nm`.

  * One of the bigger Mitaka features is shared filesystem support
    (Manila).  We download a shared filesystem image and configure
    Manila s...