Fix calls to nfs4_return_one_state where lock is held

These calls indicated lock was not held, when in fact it was
held, guaranteeing a deadlock.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
MORE Eliminate use of fsal_export exp_entry where easy to do so

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Add req_op_context to FSAL commit op

Also since this is an API change, bump major API to 2

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>
Make state_del, state_del_locked, and nfs4_State_Del void

There really is no failure here. If the HashTable_del fails, it is
because the entry actually is not in the hash table, which may signify
an inconsistency but isn't worth passing up the stack.

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>