FSAL_LUSTRE/Upcalls: fix bug in idx management

Change-Id: I02606dc4c9d7177ad62e972c2fcaf93d3e667998
Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>
FSAL_LUSTRE/Upcalls: avoid records generated by Ganesha itself

Change-Id: Ie554cf69f56a874e14b1374605c68c9d2860d559
Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>
FSAL_LUSTRE/Upcalls: moving treatment of rec to a dedicated function

Change-Id: Icebae67e16117f3cc9714791a6c90f46518ea979
Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>