Fix Travis builds

The release of rspec 3.2.0 broke a lot of tests. rspec-puppet 2.0 has a
dependency on rspec ~> 2.0, so pinning to that resolves the problems.

Author: elyscape

Gemfile

@@ -12,7 +12,7 @@ end
 
 group :development, :unit_tests do
   gem 'rake', '~> 10.1.0',       :require => false
-  gem 'rspec-puppet',            :require => false
+  gem 'rspec-puppet', "~> 2.0",  :require => false
   gem 'puppetlabs_spec_helper',  :require => false
   gem 'puppet-lint',             :require => false
   gem 'pry',                     :require => false