XFS no longer supports nobarrier mount option.
It has been deprecated for a long time[1] and removed in
recent kernel versions resulting in an error when trying to
mount: "kernel: XFS (loop0): unknown mount option [nobarrier]."
[1] - https://patchwork.kernel.org/patch/9486549/
Change-Id: Iaa9208fb20545ae9ac990f0e180899108d983123
4ab3706b75