Revert "会員登録申請のURL変更"

This reverts commit 711b50583e18e2af148fd42435133c94bea11672.
django-inspectional-registrationをアップデート
notification_emailの文面変更
supplement_class -> supplement
Merge pull request #796 from kawazrepos/794

django-inspectional-registrationをアップデート closes #794