to check max token length by coap spec
to check max token length by coap spec

token lengths 9~15 are reserved.
it must be preocessed as a message format error.

Change-Id: I84b2e51b7364fef4e4dae0d60b1b5010fd059ad2
Signed-off-by: jihwan.seo <69598d7552022c520cfdbefd16641727c7ff4ab5@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2235
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Jon A. Cruz <d4ae605477945a543a3ecda8955c93978db16a84@osg.samsung.com>

santais/iotivity,rzr/iotivity,rzr/iotivity,WojciechLuczkow/iotivity,WojciechLuczkow/iotivity,rzr/iotivity,WojciechLuczkow/iotivity,santais/iotivity_1.1,santais/iotivity_1.1,WojciechLuczkow/iotivity,santais/iotivity_1.1.0,iotivity/iotivity,iotivity/iotivity,santais/iotivity_1.1,tienfuc/iotivity-democlient-snap,rzr/iotivity,santais/iotivity_1.1,tienfuc/iotivity-democlient-snap,santais/iotivity_1.1.0,santais/iotivity,santais/iotivity_1.1.0,tienfuc/iotivity-democlient-snap,tienfuc/iotivity-democlient-snap,tienfuc/iotivity-democlient-snap,tienfuc/iotivity-democlient-snap,santais/iotivity_1.1.0,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,WojciechLuczkow/iotivity,iotivity/iotivity,santais/iotivity,iotivity/iotivity,santais/iotivity,santais/iotivity_1.1.0,santais/iotivity,tienfuc/iotivity-democlient-snap,tienfuc/iotivity-democlient-snap,tienfuc/iotivity-democlient-snap,santais/iotivity_1.1,tienfuc/iotivity-democlient-snap,WojciechLuczkow/iotivity,santais/iotivity_1.1,WojciechLuczkow/iotivity,santais/iotivity,santais/iotivity,iotivity/iotivity,santais/iotivity_1.1.0,santais/iotivity_1.1,WojciechLuczkow/iotivity,santais/iotivity_1.1.0,santais/iotivity_1.1