Code review comment for lp:~alfonsosanchezbeato/media-hub/fix-refs

Tested with silo 28 on arale. No leaking file descriptors anymore.

Used test script:

 $ while true ; do ls -1 /proc/`pidof media-hub-server`/fd | wc -l ; sleep 1 ; done

While playing different media files with video player and music-app.