Swift API Updates

This PR updates the OpenStack Swift API to the latest standards. Here is what is included:

- Prefer `getSomeApi()` for all APIs
- Removed deprecated 1.8 methods
- Updated deprecations to the `*ForRegionAndBlah` methods to 3.0
- Whitespace cleanup
- Annotation reordering
I'm assuming "/" is default with no @Path annotation? (I looked but couldn't quickly confirm that).