Added API to reset SVR DB

Added API to reset SVR DB

OCResetSVRDB() added to reset the SVR DB of the device

Patch #1: Initial upload
Patch #2: Fix based on Chul's comments

Change-Id: I2b55eaad5dd4c81f45373ca1dbde113c01d0a93d
Signed-off-by: Jongmin Choi <jminl.choi@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14791
Reviewed-by: Jongsung Lee <js126.lee@samsung.com>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: dongik Lee <dongik.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit 2de9ab10e67d24111202aa8e255b5bfb2634cee2)
Reviewed-on: https://gerrit.iotivity.org/gerrit/15307