rework the migration to use the EE ones

ee/db/migrate/20170825015534_add_file_store_to_lfs_objects.rb → db/migrate/20170825015534_add_file_store_to_lfs_objects.rb

@@ -23,17 +23,9 @@ class AddFileStoreToLfsObjects < ActiveRecord::Migration
   #
   # To disable transactions uncomment the following line and remove these
   # comments:
-  disable_ddl_transaction!
+  # disable_ddl_transaction!
 
-  def up
-    unless column_exists?(:lfs_objects, :file_store)
+  def change
     add_column(:lfs_objects, :file_store, :integer)
   end
-  end
-
-  def down
-    if column_exists?(:lfs_objects, :file_store)
-      remove_column(:lfs_objects, :file_store)
-    end
-  end
 end

ee/db/migrate/20170918072949_add_file_store_job_artifacts.rb → db/migrate/20170918072949_add_file_store_job_artifacts.rb

@@ -4,15 +4,7 @@ class AddFileStoreJobArtifacts < ActiveRecord::Migration
   disable_ddl_transaction!
   DOWNTIME = false
 
-  def up
-    unless column_exists?(:ci_job_artifacts, :file_store)
+  def change
     add_column(:ci_job_artifacts, :file_store, :integer)
   end
-  end
-
-  def down
-    if column_exists?(:ci_job_artifacts, :file_store)
-      remove_column(:ci_job_artifacts, :file_store)
-    end
-  end
 end

ee/db/migrate/20171214144320_add_store_column_to_uploads.rb → db/migrate/20171214144320_add_store_column_to_uploads.rb

@@ -6,15 +6,7 @@ class AddStoreColumnToUploads < ActiveRecord::Migration
 
   DOWNTIME = false
 
-  def up
-    unless column.exists?(:uploads, :store)
+  def change
     add_column(:uploads, :store, :integer)
   end
-  end
-
-  def down
-    if column.exists?(:uploads, :store)
-      remove_column(:uploads, :store)
-    end
-  end
 end