Add rubocop to rake test and rake test_ci

lib/tasks/gitlab/test.rake

@@ -2,6 +2,7 @@ namespace :gitlab do
   desc "GITLAB | Run all tests"
   task :test do
     cmds = [
+      %W(rake rubocop),
       %W(rake spinach),
       %W(rake spec),
       %W(rake jasmine:ci)

lib/tasks/rubocop.rake

+require 'rubocop/rake_task'
+RuboCop::RakeTask.new

lib/tasks/test.rake

@@ -9,5 +9,5 @@ unless Rails.env.production?
   require 'coveralls/rake/task'
   Coveralls::RakeTask.new
   desc "GITLAB | Run all tests on CI with simplecov"
-  task :test_ci => [:spinach, :spec, 'coveralls:push']
+  task :test_ci => [:rubocop, :spinach, :spec, 'coveralls:push']
 end