label.title length validation
Error occurs if user tries to add label with very long title (> 255 chars)
ActiveRecord::StatementInvalid (Mysql2::Error: Data too long for column 'title' at row 1: INSERT INTO `labels` (`title`, `description`, `color`, `project_id`, `created_at`, `updated_at`) VALUES ('very long string .... -- SHORTENED ', '', '#428bca', 128, '2016-08-11 07:40:56', '2016-08-11 07:40:56')):
config/initializers/connection_fix.rb:20:in `execute'
app/controllers/projects/labels_controller.rb:30:in `create'
lib/gitlab/middleware/go.rb:16:in `call