Add basic spec tests for the domain template to test rendering through
simple wrapping of a config object to provide values for class instance
variables used by the template as it mostly mirrors those required.
Reporting the MAC address being looked for in the ARP table should help
determine why some machines pick up an address belonging to another
when starting multiple VM's in parallel.
Add some basic spec tests for the WaitTillUp action class to lay some
foundations. Utilize vagrant-spec pinned to a known working commit for
tests to pass consistently until they provide releases.
Requires updating some of the rspec libraries and includes
sharedcontext.rb from the jantman/vagrant-r10k project on github.
