MH-9488 -- Fixed media inspection mime type setter

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13966 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9488 -- Fixed media inspection service unit tests

git-svn-id: http://opencast.jira.com/svn/MH/trunk@13967 e6edf6fb-f266-4316-afb4-e53d95876a76