removed unnecessary BLE interface method

removed unnecessary BLE interface method

and both initialize and terminate method are called
here and there irregularly.
to make sure correct usage, I modified BLE codes related interface

Change-Id: I26a89ae3079a834200533678e2ae8aba0d683122
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4767
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>