Fix issues when deleting an institution. Bug 1314440

1. Remove all institution collections
2. Remove all institution custom layouts
3. Remove all institution registrations

Change-Id: I87a36e601571054305e2948d460c2bb670825ee6
Signed-off-by: Son Nguyen <son.nguyen@catalyst.net.nz>
Merge "Fix issues when deleting an institution. Bug 1314440"