webos-image: luna-prefs=6

:Release Notes:
Fix return value of RemoveAppProperty for invalid key

:Detailed Notes:
submissions/5..submissions/6
20d6873 RemoveAppProperty returnvalue fix for invalid key

:Testing Performed:
miniBAT

:QA Notes:

:Issues Addressed:
[GF-54054] RemoveAppProperty is returning true for invalid parameters
[GF-55639] CCC: luna-prefs=6

Open-webOS-DCO-1.0-Signed-off-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>

Change-Id: I980def39523d78a9014591a25a75890b487e1183
Reviewed-on: https://g2g.palm.com/4210
Reviewed-by: DCO Verification
Build: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Build: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Tested-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Joungyong Choi <joungyong.choi@lge.com>
Tested-by: Joungyong Choi <joungyong.choi@lge.com>