check the method type of request info.

check the method type of request info.

if method type of request info is invalid,
CA has to return error code to RI Layer.

Change-Id: Ic34da1c13e63172885a44a114a86f52cbbb34f6f
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4565
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: MyeongGi Jeong <myeong.jeong@samsung.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
(cherry picked from commit f6bc7833c6a07e2c945288a6cccfb64f76b2757c)
Reviewed-on: https://gerrit.iotivity.org/gerrit/4577