webos-image: luna-service2=195,v3.9.4

:Release Notes:
Remove subscription on client shutdown.

:Detailed Notes:
submissions/194..submissions/195
f6e2f90 Remove subscription on client shutdown

:Testing Performed:
Integration tests. MiniBAT.

:QA Notes:

:Issues Addressed:
[BHV-10440] Luna doesn't always notify when subscriber exits
[CMB-474] Luna doesn't always notify when subscriber exits
[CMB-549] CCC: luna-service2=195,v3.9.4

Open-webOS-DCO-1.0-Signed-off-by: Alexandr Smoktal <alexandr.smoktal@lge.com>

Change-Id: I18757fb87ee618064e358ce7262823cb961724fb
Originally-Reviewed-on: https://gpro.palm.com/56035
Reviewed-on: https://g2g.palm.com/6331
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>