Rudder

The method uses the execresult keyword to call augtool and captures its output to the given variable name.
But the method always return a success even when executing augeas commands with syntax errors.
execresult is not able to catch the exit code, we should at least properly document that the method only reports success and try to fix it in 7.3 when we should be able to
better interact with third-party tools using custom resources.

To reproduce, just try to execute the method with:

set /files/etc/network/interfaces/autooo[child::1 = 'vmbr0']/1 vmbr0
save

See how the report is still a success.