Do not process deleted states.

For delegation, the state might have been revoked.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Cleanup the delegation state.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Confirm delegation validity before revoke.

The client might have already returned the delegation before the
server revokes it.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Change log level for non failure case.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>