Add reopen GPFS method

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Make NLM lock upcalls work!

NLM Lock upcalls don't work currently at all due to up_async_lock_grant
or up_async_lock_avail not setting the fsal field. Also, initialize
req_ctx with export and fsal_export in nlm4_Granted_Res.

Also fixed initializing the "fsal" filed in couple other up call
wrappers.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Remove duplicate owner type comparisions.

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>