Fix OCW CMS deployment state
Fix OCW CMS deployment state

* Remove sparse checkout behavior.
* Change repository working copy location and make a symlink for Plone `src'.
* Use rsync to sync the `publishing' directory of the working copy to
  /mnt/ocwfileshare/OCWEngines
* Add comment to explain manual setup that's not covered by automation.

mitodl/salt-ops,mitodl/salt-ops