Update Log message for "resource Broker".

Update Log message for "resource Broker".

it will be shown when is called its related function.
and can be shown more detail(ex: the moment when is found item).
modify log message existing previously.
all log message will be shown before its related action' excution.
also delete white space.

Change-Id: Ibaf2c611ce17bb4635ebd6c68f530d5cc8a40b37
Signed-off-by: doil.kwon <doil.kwon@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1983
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>