server: Try harder to find compatible container
server: Try harder to find compatible container

Just grabbing the first container and then validate the create classes
doesn't really work; we search for compatible create classes right away.

Fixes issue introduced with 3fae8be1 if MediaExport has virtual folders
enabled.

Pelagicore/Media-Manager-Rygel-patched,jku/rygel,Tarnyko/rygel,GNOME/rygel,GNOME/rygel,jku/rygel,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched