added new build updater, specs and refactored allowed_ids

...controllers/projects/cycle_analytics/events_controller.rb

lib/gitlab/cycle_analytics/author_updater.rb

lib/gitlab/cycle_analytics/build_updater.rb

lib/gitlab/cycle_analytics/code_event.rb

lib/gitlab/cycle_analytics/issue_allowed.rb

lib/gitlab/cycle_analytics/issue_event.rb

lib/gitlab/cycle_analytics/merge_request_allowed.rb

lib/gitlab/cycle_analytics/production_event.rb

lib/gitlab/cycle_analytics/review_event.rb

lib/gitlab/cycle_analytics/staging_event.rb

lib/gitlab/cycle_analytics/updater.rb

spec/lib/gitlab/cycle_analytics/author_updater_spec.rb

spec/lib/gitlab/cycle_analytics/build_updater_spec.rb