Feature/provisioner reorganize

- [x] renamed the current ``daemon`` directory to ``worker``, and moved the current tests, gemfile, etc underneath ``worker``
- [x] renamed the new ``multitenant`` directory to ``master``
- [x] updated paths where necessary: in worker rspec/rubocop, default configs, provider plugins, ui tests, and in the new master
- [x] end result is ``/loom/provisioner/[master, worker]``

i suggest just looking at the changelists... renames and edits were checked in separately.  there weren't that many edits.