Index: db/migrate/20150927013306_force_admin_to_change_password.rb
===================================================================
--- db/migrate/20150927013306_force_admin_to_change_password.rb	(revision 0)
+++ db/migrate/20150927013306_force_admin_to_change_password.rb	(working copy)
@@ -0,0 +1,8 @@
+class ForceAdminToChangePassword < ActiveRecord::Migration
+  def change
+    admin = User.find_by_login('admin')
+    if admin && ! admin.last_login_on && ! admin.passwd_changed_on
+      admin.update_columns(must_change_passwd: true)
+    end
+  end
+end