use rspec-puppet 2.0.0 from gems instead of git

Author: jhoblitt

Gemfile

@@ -17,10 +17,7 @@ group :development, :test do
   gem 'puppetlabs_spec_helper',  :require => false
   gem 'puppet-lint', '>= 1.1.0', :require => false
   gem 'puppet-syntax',           :require => false
-  gem 'rspec-puppet',
-    :git     => 'https://github.com/rodjek/rspec-puppet.git',
-    :ref     => 'v2.0.0',
-    :require => false
+  gem 'rspec-puppet', '~> 2.0.0', :require => false
 end
 
 group :beaker do