Make package migrations pass [ci skip]

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

db/migrate/20180720120026_create_packages_package_files.rb → db/migrate/20180720120726_create_packages_package_files.rb

 class CreatePackagesPackageFiles < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
   DOWNTIME = false
 
+  disable_ddl_transaction!
+
   def change
     create_table :packages_package_files do |t|
-      t.references :package, index: true, foreign_key: { on_delete: :cascade }, null: false
+      t.references :package, index: true, null: false
       t.string :file
       t.integer :file_type
       t.integer :file_store
@@ -13,5 +17,9 @@ class CreatePackagesPackageFiles < ActiveRecord::Migration
 
       t.timestamps null: false
     end
+
+    add_concurrent_foreign_key :packages_package_files, :packages_packages,
+      column: :package_id,
+      on_delete: :cascade
   end
 end

db/migrate/20180720121404_create_packages_maven_metadata.rb

 class CreatePackagesMavenMetadata < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
   def change
     create_table :packages_maven_metadata do |t|
-      t.references :package, index: true, foreign_key: { on_delete: :cascade }, null: false
+      t.references :package, index: true, null: false
       t.string :app_group, null: false
       t.string :app_name, null: false
       t.string :app_version, null: false
 
       t.timestamps null: false
     end
+
+    add_concurrent_foreign_key :packages_maven_metadata, :packages_packages,
+      column: :package_id,
+      on_delete: :cascade
   end
 end