Provisioner top-level CI framework

This PR establishes everything necessary for lint/syntax/unit testing via rubocop/rspec.

```
$ cd coopr-provisioner && bundle exec rake
rubocop -D
Inspecting 33 files
.................................

33 files inspected, no offenses detected
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -I/Library/Ruby/Gems/2.0.0/gems/rspec-core-3.1.7/lib:/Library/Ruby/Gems/2.0.0/gems/rspec-support-3.1.2/lib /Library/Ruby/Gems/2.0.0/gems/rspec-core-3.1.7/exe/rspec --pattern spec/\*\*\{,/\*/\*\*\}/\*_spec.rb
No examples found.

Finished in 0.00045 seconds (files took 0.2154 seconds to load)
0 examples, 0 failures
```

Testing is enabled for Travis CI.