Fix OTM Unittest

Fix OTM Unittest

Fix OTM Unittest error

Patch #1-3: PT SVR DB modified to use x.org.iotivity.dpc
Patch #4-6: sample server's SVR DB modified to use x.org.iotivity.dpc.
           Also otmunittest.cpp updated to ignore the unknown server.
Patch #7: Updated to exit the unittest
          in case of two more devices are running on the subnet.

Change-Id: Ifd0c8c6043a6967f0e936da0086ee0fb7ed7e0b3
Signed-off-by: Jongmin Choi <jminl.choi@samsung.com>
Signed-off-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/10061
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>