MH-9402 -- Fixed target-tags NullPointer

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13899 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9454 -- Fixed scheduler service series reference creation

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13900 e6edf6fb-f266-4316-afb4-e53d95876a76