Use latest rspec-system gem

Signed-off-by: Ken Barber <ken@bob.sh>
Moved some of the puppet setup stuff in system tests to rspec-system-puppet

Signed-off-by: Ken Barber <ken@bob.sh>
Merge branch 'rspec-system-puppet'

* rspec-system-puppet:
  Moved some of the puppet setup stuff in system tests to rspec-system-puppet
Get rid of examples it isn't being maintained and it belongs in docs

I think the expectation that people should drop to looking at code for examples
is wrong anyway, we should express examples through documentation if we can.

Signed-off-by: Ken Barber <ken@bob.sh>
Support for new prefabs from rspec-system

Signed-off-by: Ken Barber <ken@bob.sh>