Create wrappers for the group LunaServiceSignals

:Release Notes:
Create C++ wrapper for signals

:Detailed Notes:

:Testing Performed:
Unit-test

:QA Notes:

:Issues Addressed:
[BHV-1545] Create wrappers for the group LunaServiceSignals

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

Change-Id: I106f2a0fae8944473528080520020b419339a31d
Reviewed-on: https://g2g.palm.com/5270
Reviewed-by: DCO Verification
Reviewed-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Tested-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>