We have no DNS records for freshly installed VMs/Vagrant/Amazon images.
So, we have to skip the test there. It is enabled by default for
other test cases as it is useful itself.
We can conside to configure DNS for freshly installed VMs one day.
(cherry picked from commit 349e51611f)
In failing tests it's hard to parse very long cmdlines, so reduce
it as much as possible and still sensible. Also fix quoting of
the heartbeat command line for YAML format.
Alexander Lutay
Michael Prokop