orangefs: do not set getattr_time on orangefs_lookup

Since orangefs_lookup calls orangefs_iget which calls
orangefs_inode_getattr, getattr_time will get set.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Marshall <hubcap@omnibond.com>