MH-9403 -- Fixed unnecessary capture agent update

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13763 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9404 -- Fixed empty calendar validation

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13765 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9401 -- Fixing Workflow definition sum that is logged by the related scanner.

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13766 e6edf6fb-f266-4316-afb4-e53d95876a76