[IOT-2281] /oic/sec/amacl responding to GET but not to POST

[IOT-2281] /oic/sec/amacl responding to GET but not to POST

Until AMS and /amacl functionality is implemented, the /amacl Resource
should not be instantiated as it misleads Clients (including CTT) into
expecting full Specification behavior.

Change-Id: Id542b7a5974cb96ae84e7165326e4d2e8170d5dd
Signed-off-by: Nathan Heldt-Sheller <nathan.heldt-sheller@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20185
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>