staging: lustre: Align struct member identifiers

This patch properly left aligns all member identifiers in every
struct defined in obd_class.h for better readability.
Signed-off-by: Fabian Huegel <fabian_huegel@web.de>
Signed-off-by: Christoph Volkert <linux@christoph-volkert.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>