Update the things manager code not to produce warning messages in compilation

Update the things manager code not to produce warning messages in compilation

It is shown that most of warning messages are produced by an existance
of unused parameters in a function. Not to produce the warning message, I
make the unused parameters being commented.
Additionally, fix potential defects in things manager with
CID 65806, 81664, 81560, 82257.

Change-Id: Ie460630d0dc3306087b87b2dd5bb314b1844bc1b
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3681
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>