modify description of resource container apis to correct doxygen warnings

modify description of resource container apis to correct doxygen warnings

- fix doxygen comments of container apis to remove warnings

Change-Id: I917d3b48dd44943c803581145fa82af9ab9fb775
Signed-off-by: Minji Park <minjii.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3479
Reviewed-by: Hun-je Yeon <hunje.yeon@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>
(cherry picked from commit e1ec415d1ae3b1c32561ff471cde7a15b314b6eb)
Reviewed-on: https://gerrit.iotivity.org/gerrit/3539