changed queue destroy logic to delete the remained data in CA

changed queue destroy logic to delete the remained data in CA

In case of the receive queue in camessagehandler, we don't start
the queue thread because RI supports single thread. accordingly
we have to delete the remained data in CAQueueingThreadDestroy().

Change-Id: I18667b97d97ac83dabcb0affb13b4a593fc15a9f
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/7921
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jon@joncruz.org>