anchor.diff:  
   . (Optional) Install vagrant-cachier to squeeze a bit more performance out of
   the process:
  +
   --------------------------------------
   vagrant plugin install vagrant-cachier
   --------------------------------------
   
   . Validate your installed dependencies:
  +
   -------------------------------------
   mvn -Dtests.vagrant -pl qa/vagrant validate
   -------------------------------------
  
positive.code: In general its best to stick to testing in vagrant because the bats scripts are
  destructive. When working with a single package its generally faster to run its
  tests in a tighter loop than maven provides. In one window:
  --------------------------------
  mvn -pl distribution/rpm package
  --------------------------------
  and in another window:
  ----------------------------------------------------
  vagrant up centos-7 && vagrant ssh centos-7
  cd $RPM
  
negative.code: https://github.com/mitchellh/vagrant/issues/4479
  
  Some vagrant commands will work on all VMs at once:
  
  ------------------
  vagrant halt
  vagrant destroy -f
  ------------------
  
  
  ----------
  vagrant up
  ----------
  
  would normally start all the VMs but we've prevented that because that'd
  consume a ton of ram.
  
  