Add Aus->ContentProvider foreign key, and a method to get the total size of an Au (with a test).
cherrypick be2743f - generate UUids, and some content provider tests.
make contentProvider extract the name of it's permission URL host.

Conflicts:
	src/LOCKSSOMatic/SWORDBundle/Controller/DefaultController.php
Get new aus from content providers, get the open au from a content provider, etc.
merge schema-changes-aus.
Clean up the tests a little, and cleanup after the tests.
Add some defaults to Aus and ContentProviders.
don't duplicate.
fix up some tests.