aggregator: Make pad eos as soon as all buffers are processed, dont way for events
aggregator: Make pad eos as soon as all buffers are processed, dont way for events

https://bugzilla.gnome.org/show_bug.cgi?id=781673

StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer