Add a more specific capability bit to FSAL for delegations.
Also update gpfs configuration file to enable delegations.

Signed-off-by: Jeremy Bongio <jbongio@us.ibm.com>
Reviewed-by: Malahal Naineni <malahal@us.ibm.com>
Reviewed-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Add proper support for WND4_NOT_WANTED during NFSv4 opens.

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