smbd: Pass share_access/access_mask explicitly to grant_fsp_oplock_type()

smbd: Pass share_access/access_mask explicitly to grant_fsp_oplock_type()

Why? While restructuring open_file_ntcreate() I found the data flow for
these values confusing: grant_fsp_oplock_type() depends on
fsp->access_mask, which changes its value inside
open_file_ntcreate(). I find the data flow easier to follow if it
happens in explicit variables.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>