Update pstat init API to fill device id of pstat as doxm's uuid

Update pstat init API to fill device id of pstat as doxm's uuid
in case of pstat's device id is empty.

If you want test with empty device uuid,
please use the resource/csdk/security/provisioning/sample/oic_svr_db_randompin_with_empty_deviceid.dat

Patch #1 : Intial upload
Patch #2 : Add json file according to Mr.JongSung Lee's comment.

Change-Id: I9c791074cd5abe179c2c4cccbb66e0d95d044399
Signed-off-by: leechul <chuls.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/7383
Reviewed-by: Kyungsun Cho <goodsun.cho@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>