webos-image: luna-prefs=5

:Release Notes:
Crash fixes and other fixes.

:Detailed Notes:
submissions/4..submissions/5
fef9725 Remove assert on invalid incoming data
ef76149 RemoveAppProperty returnvalue fix for failure case

:Testing Performed:
MiniBAT

:QA Notes:

:Issues Addressed:
[GF-54192] Excessive crashes in luna-prefs /lib/libc.so.6(kill+0xc)
[GF-54054] RemoveAppProperty is returning true for invalid parameters
[GF-54274] CCC: luna-prefs=5

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

Change-Id: Ia78dadbf0ae7b3c3ffc24631bf1537366f49ce1d
Reviewed-on: https://g2g.palm.com/4137
Reviewed-by: DCO Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
Tested-by: Susan Montooth <susan.montooth@lge.com>