Change pstat.deviceuuid from R-only to RW
Change pstat.deviceuuid from R-only to RW

As SWG decided that pstat.deviceuuid is RW,
pstat handler has been fixed accordingly.

Patch #1: Initial upload

Change-Id: Ibc0b1d86ddfb06306268dddaf07f38152d8800f2
Signed-off-by: Jongmin Choi <66b8cdb346b630bb94f83f6cf34f36b72c34a8bd@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14069
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Kevin Kane <cd40c34e976f30c9e62efcf24e04c516bc3a3b05@microsoft.com>
Reviewed-by: Nathan Heldt-Sheller <214cad4ab375dc179217f558f8b9854a693faf7f@intel.com>
Reviewed-by: Uze Choi <3a26c91d8a4a3c9e246e43339f4782bb2483aece@samsung.com>
Reviewed-by: Randeep Singh <46ce9385024397d3e4d9ed63be2e0a0d801e95b7@samsung.com>
(cherry picked from commit 4f64da7a5e385b66948daee3d61b9b2bf6a408e8)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14347

iotivity/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity