alljoyn: remove script/end script to eliminate dangling /bin/sh

:Release Notes:
Upstart scripts using script/end script result in one extra /bin/sh
process hanging around

:Detailed Notes:
Replacing the 'script' blocks with 'exec' where possible reduced the
number of excess /bin/sh processes to 1.

:Testing Performed:
MiniBAT: See GF-43176

:QA Notes:

:Issues Addressed:
[GF-35091] Upstart scripts leaving many dangling /bin/sh procs
[GF-43176] CCC: alljoyn=r5

Open-webOS-DCO-1.0-Signed-off-by: Wonhong Kwon <wonhong.kwon@lge.com>

Change-Id: I36f0f93537f3c0ba66d243c76f77fb516721bd81
Reviewed-on: https://g2g.palm.com/3703
Reviewed-by: Wonhong Kwon <wonhong.kwon@lge.com>
Tested-by: Wonhong Kwon <wonhong.kwon@lge.com>
Reviewed-by: Ed Chejlava <ed.chejlava@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>