FSAL_PROXY: fixes bad seqid in pxy_open_confirm

Change-Id: I6b75d2a16a302cc740854ba680e1e43fa5448c53
Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>
FSAL_PROXY: fixes bad seqid in pxy_do_close

Change-Id: Ia64a9bf9d143506ad6def83c1ac93784c242ed18
Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>