Add shutdown() to disable send/receive on a socket in catcpserver

Add shutdown() to disable send/receive on a socket in catcpserver

- Add shutdown() before close socket when closing connection in catcpserver

Change-Id: Ibe2ed942428f754dc148bd1c48422036f84a319c
Signed-off-by: Minji Park <minjii.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14343
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Hyuna Jo <hyuna0213.jo@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>