Fixed bug about Subscription logic on Consumer.

Fixed bug about  Subscription logic on Consumer.

Now, consumer notify all messages of providers to user,
included subscription acceptance message.
but, subscription acceptance message no need for user.

and, in this patch, included deletion of unused comments.

Change-Id: I4e21bece1601492e55d0adb5d2f1bb49dac46277
Signed-off-by: jyong2.kim <jyong2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8349
Reviewed-by: Hun-je Yeon <hunje.yeon@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>