MH-9402 -- Fixed target-tags from prepare av operation handler

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13897 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9455 -- Fixed IllegalStateException when no organization is set

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13898 e6edf6fb-f266-4316-afb4-e53d95876a76