Add additional folders for ls2 role-files

:Release Notes:
Add additional folders to look for third-party's roles and services

:Detailed Notes:

:Testing Performed:
Starfish image was built.

:QA Notes:

:Issues Addressed:
[GF-38331] Luna-service must also search /var/palm/ls2-dev for roles and services

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

Change-Id: I33e86bdc4abe477597d929944eb7e3e724456fd5
Open-webOS-DCO-1.0-Signed-off-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-on: https://g2g.palm.com/3568
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>