End of Track test failing

[IainCole]

This test never really did was it was intended to do because the music delivery system didn't handle backpressure so the track "ended" (i.e. all the bytes had been delivered from libspotify) much earlier than the 11 seconds length of the track. Now that we're handling the data stream from libspotify properly we need to modify the test to actually pipe the data to something that will consume it at the correct rate so that the test works as it should.