Fix db8 test_luna_service unit test

:Release Notes:
Fix permissions for test_luna_service

:Detailed Notes:
Register tect client side as "com.palm.mojlstest.client"
Add permissions for service/client side

:Testing Performed:
$ /usr/lib/db8/tests/test_luna_service

Succeeded

-----------------------------------
Results:     1 succeeded, 0 failed

:QA Notes:

:Issues Address:
[GF-42588] test_luna_service: permissions issue

Open-webOS-DCO-1.0-Signed-off-by: Maksym Sditanov <maxim.sditanov@lge.com>

Change-Id: Ida16020dc150c191d40e114589585f1a9ecb5440
Reviewed-on: https://g2g.palm.com/3723
Reviewed-by: Build Verification
Tested-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Kyouhyun Hwang <kyouhyun.hwang@lge.com>
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>