Configure Fedora to use the SQL database instead of simple file persistence

[dannylamb]

By default, we ship with 'file' persistence, which isn't really meant for production. We should switch it over to use the SQL database being used (claw_db is the variable to check), either MySQL or Postgres, because it's better, faster, and more reliable. You can configure it in our repository.json that we template out here: https://github.com/Islandora-Devops/ansible-role-fcrepo/blob/master/templates/repository.json

[whikloj]

How to do the configuring : https://wiki.duraspace.org/display/FEDORA5X/Configuring+JDBC+Object+Store