Add basic beaker tests
Tests only cover basic installs of standalone, passenger, and unicorn puppetmasters
Restrict rspec gem to versions before 3.0.0
Avoid breaking rspec-puppet tests; will need to update tests later
Lock puppetlabs/ruby to 0.1.1
Current master branch of puppetlabs/ruby module breaks debian/ubuntu due to missing packages.
Merge pull request #96 from danieldreier/beaker_tests

Add basic beaker tests