[IOT-1351] CloudClient App crashed while Signing Out

[IOT-1351] CloudClient App crashed while Signing Out

[Patch #2] Resolve possible crash reason on 32-bit arch
[Patch #3] Implement correct Sign Up/In/Out flow according to spec

Change-Id: I566dcedee363ab91ecec883e531cdb8ad6fa1f42
Signed-off-by: Andrii Shtompel <a.shtompel@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12347
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Md. Imtiaz Hossain <imtiaz.h@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>