luna-service2=155,Disable LS2 security as DISTRO

:Release Notes:
Make the security setting a DISTRO feature
Add additional folders to look for third-party's roles and services
Add option to control security in configuration files
Apply centralized nice script
Added empty transport message stub singleton in failed messages

:Detailed Notes:
submissions/154..submissions/155
ee8a628 Add additional folders to look for roles/service
ab0205a Add WEBOS_LS2_SECURE variable to control security
12c322f Apply centralized nice script
02a3d74 Add empty transport message stub for failed messages

:Testing Performed:
Minibat was done on the target

:QA Notes:

:Issues Addressed:
[GF-38331] Luna-service must also search /var/palm/ls2-dev for roles and services
[GF-39397] LS2: Make the security setting a DISTRO feature
[GF-36804] Adjust NICE values for important processes
[GF-38362] luna-service2: Add empty transport message stub for failed
[GF-40551] CCC: luna-service2=155

Open-webOS-DCO-1.0-Signed-off-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>

Change-Id: Ie433fec98968842cdab838ed09f983a87b84fc46
Reviewed-on: https://g2g.palm.com/3570
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>