(QE-243) beaker needs an easy way to get modules onto the SUTs

- support the rspec-system style:
    puppet_module_install(:source => proj_root, :module_name =>
    'haproxy')
Merge pull request #2 from anodelman/easy-module-install

(QE-243) beaker needs an easy way to get modules onto the SUTs
Add serverspec support

This adds the ability for serverspec to run matcher commands on the
hosts of beaker-rspec via calling the DSL commands on the given host.