[IOT-1845] Fix session leak

[IOT-1845] Fix session leak

1. Close OCDoOwnershipTransfer session after successful Ownership
   Transfer (i.e., from ReadyForNomalStatusHandler).

2. Use OC_STACK_UNAUTHORIZED_REQ instead of the CA result returned
   by CAcloseSslConnection when calling SetResult - because SetResult
   expects an OC result as parameter.

Change-Id: I075f7fe168a35a0ab6f5c74f1faa12108156727b
Signed-off-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17485
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Greg Zaverucha <gregz@microsoft.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Kevin Kane <kkane@microsoft.com>