rename 'convert_pasted_images_quality' site setting to 'png_to_jpg_quality'

db/migrate/20170511080007_rename_convert_pasted_images_quality_site_setting.rb

@@ -0,0 +1,9 @@
+class RenameConvertPastedImagesQualitySiteSetting < ActiveRecord::Migration
+  def up
+    execute "UPDATE site_settings SET name = 'png_to_jpg_quality' WHERE name = 'convert_pasted_images_quality'"
+  end
+
+  def down
+    execute "UPDATE site_settings SET name = 'convert_pasted_images_quality' WHERE name = 'png_to_jpg_quality'"
+  end
+end