Cloud provisioning modification in listener return type.

Cloud provisioning modification in listener return type.

patch2: Cloud provisioning Listener modification
patch3: Signout bug fix

Change-Id: Ibf43255ff82891b3ef7026763b5d2796fe839abf
Signed-off-by: Sunil Kumar K R <sunil.k14@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15865
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16415
Tested-by: jenkins-iotivity <jenkins@iotivity.org>