Add delegation conflict detection to anonymous ops.

Signed-off-by: Jeremy Bongio <jbongio@us.ibm.com>
anonymous_io status was overwritten after conflict was detected.

Signed-off-by: Jeremy Bongio <jbongio@us.ibm.com>
Add delegation conflict detection for NLM.

Signed-off-by: Jeremy Bongio <jbongio@us.ibm.com>