Fix rubocop in EE following https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10441

db/migrate/20160718210939_add_ldap_sync_state_indices_to_groups.rb

 # Migration type: online without errors (works on previous version and new one)
+
+# rubocop:disable RemoveIndex
 class AddLdapSyncStateIndicesToGroups < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
   disable_ddl_transaction!

db/migrate/20160718211006_remove_last_ldap_sync_status_index_from_groups.rb

 # Migration type: online without errors (works on previous version and new one)
+
+# rubocop:disable RemoveIndex
 class RemoveLastLdapSyncStatusIndexFromGroups < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
   disable_ddl_transaction!

db/migrate/20160810153405_remove_geo_node_key_id_index.rb

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

db/migrate/20170207150212_add_indexes_to_mirrors.rb

+# rubocop:disable RemoveIndex
 class AddIndexesToMirrors < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

db/migrate/20170208144550_add_index_to_mirrors_last_update_at_fields.rb

+# rubocop:disable RemoveIndex
 class AddIndexToMirrorsLastUpdateAtFields < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

db/migrate/20170224075132_add_access_keys_to_geo_nodes.rb

+# rubocop:disable RemoveIndex
 class AddAccessKeysToGeoNodes < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

db/migrate/20170306180725_add_index_to_milestone_id_on_boards.rb

+# rubocop:disable RemoveIndex
 class AddIndexToMilestoneIdOnBoards < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 

db/migrate/20170402231018_remove_index_for_users_current_sign_in_at.rb

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