This currently deploys the core services for a working Swift which are
account/container/object/proxy.

I've included some basic docs in docs/swift-related.rst, which gives
usage instructions and more context on this patch. These are really to
give an overview of the state of Swift in Kolla as of now, so unless
there's some major inaccuracy there please don't nitpick it.

Change-Id: Id0c54be3e24c46459c40b16b7020f05bddbe1b19
Implements: blueprint ansible-swift

Known bugs/TODOs at this time of this patch update:

https://bugs.launchpad.net/kolla/+bug/1477990
https://bugs.launchpad.net/kolla/+bug/1477993



Implements: Blueprint swift-container
Closes-bug: #1477992
Co-Authored-By: Paul Bourke <paul.bourke@oracle.com>
Change-Id: I031f88a7cd1867104fef12df6ab3ffcc06cb65d6