Merge branch 'rs-disable-colorization' into 'master'

Disable colorization if STDOUT is not a tty

Closes #6118 

See merge request !2403

Gemfile

@@ -247,7 +247,7 @@ group :development, :test do
   gem 'byebug', platform: :mri
   gem 'pry-rails'
-  gem 'awesome_print', '~> 1.2.0'
+  gem 'awesome_print', '~> 1.2.0', require: false
   gem 'fuubar', '~> 2.0.0'
   gem 'database_cleaner', '~> 1.4.0'

lib/tasks/gitlab/task_helpers.rake

@@ -2,6 +2,8 @@ module Gitlab
   class TaskAbortedByUserError < StandardError; end
 end
+String.disable_colorization = true unless STDOUT.isatty
+
 namespace :gitlab do
   # Ask if the user wants to continue