Fix infinite loop in GroupAction.

Fix infinite loop in GroupAction.

Fix infinite loop in FindAndDeleteActionSet function.

So we change the code.

Fix [IOT-282]

Change-Id: I23d3663ea32c5e56a456b013d4c697fcf0f886d2
Signed-off-by: HyunJun Kim <hyunjun2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/286
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>
(cherry picked from commit 6a8ad4c43926df7541b414452ed57dbc9761137a)
Reviewed-on: https://gerrit.iotivity.org/gerrit/380
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>