Fix a wrong return if an user does not set a MOT configuration

Fix a wrong return if an user does not set a MOT configuration

If an user does not set any MOT configuration and ownership transfer is
successfully done, then a result should be ES_OK.
If ESOwnershipTransferData->getMOTMethod() is OIC_OXM_COUNT, it means user
does not set the configuration.

Change-Id: I055beed8e893ae0754a4f5ea467cbe99f649ca4d
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17973
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>