Add more descriptive log messages in easy setup

Add more descriptive log messages in easy setup

This patch is for removing mis-used log messages and
adding one for more convenient debugging.

Change-Id: I354292210a18e16e74d8ae3c0d66b91a90f31ab9
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12963
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Heewon Park <h_w.park@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
(cherry picked from commit 13f06a192eac3c8fd6ef76fbfba9d64eb2f8e78f)
Reviewed-on: https://gerrit.iotivity.org/gerrit/13745
Reviewed-by: Senthil Kumar G S <senthil.gs@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>