* first deprecation pass, need to confirm date or version
* remove doc block updates as not needed, update runtime and remove symlinks
* add line to readme as notable release
* update version before release
--- Removed reference to tower in InventorySource and InventoryUpdate model
--- Added a migration for above change
--- Added new CONTROLLER* variables in awx/main/models/credentials/__init__.py
--- Migrated awxkit to new CONTROLLER* variables
--- Updated the tests to use new CONTROLLER* variables
--- Fix some issues with upgrade path, rename more cases
