KNL-1167 If deleting fails unlock the resource so it can be tried again.

Previously if the delete failed when you next tried to delete the file you would get an InUseException.

git-svn-id: https://source.sakaiproject.org/svn/kernel@134208 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1168 Cleanup CollectionAccessFormatter

This removed comment out code. Removes a deprecated and unused method. Removes unused imports. Uses imports instead of fully qualified class names. Logs at INFO level any exceptions when rendering items so they have a chance of being found and fixed rather than being ignored.

git-svn-id: https://source.sakaiproject.org/svn/kernel@134209 66ffb92e-73f9-0310-93c1-f5514f145a0a