[IOT-1586] Changed the policy key name for tcp discovery
[IOT-1586] Changed the policy key name for tcp discovery

The name of "x.org.iotivity.tcp" key was changed from
"x.org.iotivity.tcp" to "tcp".

Change-Id: I7bae43f823bdbe744a1cda28b27b9c72d22af996
Signed-off-by: hyuna0213.jo <a3aecee2eabd6f87461b5d05d6fd0eaf35e269ed@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14607
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Phil Coval <ff46fec9739d31cce915aabcc3a7a2c00eee4d6c@osg.samsung.com>
Reviewed-by: Jaehong Jo <69db334b3f87f30654728856fde276b43c835fe5@samsung.com>
Reviewed-by: Ziran Sun <3baa2a3e3c6d96dba4b6f1736d53815847db9a07@samsung.com>
(cherry picked from commit 37c7550bc5c1c032bd4ed7a5853c98c536914782)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14733
Reviewed-by: Dan Mihai <ba8e1833495515b49ded9e20cae80a8129155aa9@microsoft.com>

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