Add database helper 'add_timestamp_with_timezone'

changelogs/unreleased/32054-rails-should-use-timestamptz-database-type-for-postgresql.yml

+---
+title: Add database helper 'add_timestamp_with_timezone'
+merge_request: 11229
+author: blackst0ne

db/migrate/20160314114439_add_requested_at_to_members.rb

+# rubocop:disable Migration/Timestamps
 class AddRequestedAtToMembers < ActiveRecord::Migration
   def change
     add_column :members, :requested_at, :datetime

db/migrate/20160415062917_create_personal_access_tokens.rb

+# rubocop:disable Migration/Timestamps
 class CreatePersonalAccessTokens < ActiveRecord::Migration
   def change
     create_table :personal_access_tokens do |t|

db/migrate/20160610204157_add_deployments.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddDeployments < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160610204158_add_environments.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddEnvironments < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160705054938_add_protected_branches_push_access.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddProtectedBranchesPushAccess < ActiveRecord::Migration
   DOWNTIME = false

db/migrate/20160705054952_add_protected_branches_merge_access.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddProtectedBranchesMergeAccess < ActiveRecord::Migration
   DOWNTIME = false

db/migrate/20160724205507_add_resolved_to_notes.rb

+# rubocop:disable Migration/Timestamps
 class AddResolvedToNotes < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160727163552_create_user_agent_details.rb

+# rubocop:disable Migration/Timestamps
 class CreateUserAgentDetails < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160727191041_create_boards.rb

+# rubocop:disable Migration/Timestamps
 class CreateBoards < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160727193336_create_lists.rb

+# rubocop:disable Migration/Timestamps
 class CreateLists < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160805041956_add_deleted_at_to_namespaces.rb

-# rubocop:disable RemoveIndex
+# rubocop:disable RemoveIndex, Migration/Timestamps
 class AddDeletedAtToNamespaces < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160824124900_add_table_issue_metrics.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddTableIssueMetrics < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160825052008_add_table_merge_request_metrics.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddTableMergeRequestMetrics < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20160831214002_create_project_features.rb

+# rubocop:disable Migration/Timestamps
 class CreateProjectFeatures < ActiveRecord::Migration
   DOWNTIME = false

db/migrate/20160915042921_create_merge_requests_closing_issues.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class CreateMergeRequestsClosingIssues < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20161014173530_create_label_priorities.rb

+# rubocop:disable Migration/Timestamps
 class CreateLabelPriorities < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20161113184239_create_user_chat_names_table.rb

+# rubocop:disable Migration/Timestamps
 class CreateUserChatNamesTable < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20161124111402_add_routes_table.rb

 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
+# rubocop:disable Migration/Timestamps
 class AddRoutesTable < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers

db/migrate/20161221152132_add_last_used_at_to_key.rb

+# rubocop:disable Migration/Timestamps
 class AddLastUsedAtToKey < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers