Cleanup some jack server interactions

Cleanup some jack server interactions

	* src/media/sound-jack.c (sound_jack_subthread_create): Properly
	close the client upon failure to complete subthread create.

	* src/media/sound-jack.c (sound_jack_play): Improve
	logging. Properly return status code of 0 upon success and 1 on
	failure. Also cleanup the device data of the job.

	* src/media/sound-jack.c (sound_jack_change_state): properly set
	the state of the job upon start. Add code to the log of the
	unknown event message.

	* src/media/sound-jack.c (sound_jack_process): Lock the job while
	processing the jack requests. Debug log the play state when draining

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>