LU-6202 obd: replace OBD_IOC_NO_TRANSNO with sysfs file

LU-6202 obd: replace OBD_IOC_NO_TRANSNO with sysfs file

We can replace the ioctl OBD_IOC_NO_TRANSNO, which is server side
only, with a sysfs file. The original ioctl set an internal obd
device flags to simulate transactions not reaching the disk. The
new write only sysfs file behaves the exact same way.

Change-Id: Ie78feec61fab46a1982bd5caca3e89613356d2e8
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/35993
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>