[gh-604] Remove code which auto-creates sites from WDN registry

Moving to a process where the WDN registry site request form is forwarded to the university ticket system, then site created manually
[gh-604] site-email no longer needed in site creation
[gh-604] Remove the WDN Registry connection settings form
[gh-604] Remove wdn registry variables from database
[gh-604] Add Email alert settings vars to del in update function
[gh-574] Add #maincontent to form css to prevent unl feedback conflicts
[gh-626] Save liferay files at <files>/<uuid>.<extension> during migration.
Merge pull request #627 from tsteiner2/issue-626

Closes #626.
Merge pull request #611 from erasmussen2/issue-574

Closes #574
[gh-604] Remove a call to the removed function _unl_multisite_send_site_created_email().
[gh-604] Remove code that migrated sites as a cron job after automatic site creation.
Merge pull request #2 from tsteiner2/issue-604

Issue 604
Merge pull request #605 from erasmussen2/issue-604

Closes #604