Gemfile: rely on puppet-openstack_spec_helper for dependencies

Rely on puppet-openstack_spec_helper gemspec file for managing Gems
dependencies.

Change-Id: Ic92757dc024de0e31e7f788381851f956f2977d8

Gemfile

@@ -1,31 +1,11 @@
 source ENV['GEM_SOURCE'] || "https://rubygems.org"
 
-group :development, :test do
-  gem 'puppetlabs_spec_helper',               :require => 'false'
-  gem 'rspec-puppet', '~> 2.2.0',             :require => 'false'
-  gem 'rspec-puppet-facts',                   :require => 'false'
-  gem 'metadata-json-lint',                   :require => 'false'
-  gem 'puppet-lint-param-docs',               :require => 'false'
-  gem 'puppet-lint-absolute_classname-check', :require => 'false'
-  gem 'puppet-lint-absolute_template_path',   :require => 'false'
-  gem 'puppet-lint-trailing_newline-check',   :require => 'false'
-  gem 'puppet-lint-unquoted_string-check',    :require => 'false'
-  gem 'puppet-lint-leading_zero-check',       :require => 'false'
-  gem 'puppet-lint-variable_contains_upcase', :require => 'false'
-  gem 'puppet-lint-numericvariable',          :require => 'false'
-  gem 'json',                                 :require => 'false'
-  gem 'webmock',                              :require => 'false'
+group :development, :test, :system_tests do
   gem 'puppet-openstack_spec_helper',
-      :git => 'https://git.openstack.org/openstack/puppet-openstack_spec_helper',
+      :git     => 'https://git.openstack.org/openstack/puppet-openstack_spec_helper',
       :require => false
 end
 
-group :system_tests do
-  gem 'beaker-rspec',                 :require => 'false'
-  gem 'beaker-puppet_install_helper', :require => 'false'
-  gem 'r10k',                         :require => 'false'
-end
-
 if facterversion = ENV['FACTER_GEM_VERSION']
   gem 'facter', facterversion, :require => false
 else