First of some commands ignored cmd.Wait() error which means it was
impossible to notice any command errors. And others only returned
the wait error as it which when a command fails is just
`exit status <code>` which is not helpful at all.
This commit should add proper error wrapping with stderr to get useful
strings back hopefully.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
bd906cb314