Remove an vulnerability for using strcat() function in oicgroup
Remove an vulnerability for using strcat() function in oicgroup

Rather than strcat function, strncat function with a consideration of
a maximum length of string is better to be used for security reason.

Change-Id: I12b76ef4c149c66fac2b6b2963feef86d760d85f
Signed-off-by: Jihun Ha <3b6954bd112a2585eced0b86af3c85401a826886@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/7521
Reviewed-by: Uze Choi <3a26c91d8a4a3c9e246e43339f4782bb2483aece@samsung.com>
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>

iotivity/iotivity,rzr/iotivity,santais/iotivity_1.1.0,santais/iotivity_1.1.0,santais/iotivity_1.1.0,santais/iotivity_1.1.0,iotivity/iotivity,rzr/iotivity,iotivity/iotivity,santais/iotivity_1.1.0,rzr/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,santais/iotivity_1.1.0,rzr/iotivity,iotivity/iotivity,santais/iotivity_1.1.0,iotivity/iotivity,rzr/iotivity