[v2] test: Have test_fs work with non-functional guestmount tools

[Stephen Warren]

On 7/9/20 7:42 AM, Tom Rini wrote:
> Since 2011 Ubuntu has intentionally broken support for guestmount[1] by
> default and requires sysadmin intervention to re-enable support.  This
> in turn exposed that in our tests if guestmount is available but fails
> we do not fall back to trying to use sudo.  Restructure our code to try
> sudo if guestmount fails rather than only when it is not in our path.
> Further, only note that we are using fuse on success of the call.
> 
> [1]: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/759725

Reviewed-by: Stephen Warren <swarren at nvidia.com>