qnd: merge from r90269 from trunk - "enable inherited objects to search on plugins_data field"

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/tags/falcon_2012_08_20@94174 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
qnd: external media service should be accessible with BASE_USER_SESSION_PERMISSION

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/tags/falcon_2012_08_20@94199 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
adding empty directories