[fix] cms ContentQuota: demo data #4060 (#4071)
[fix] cms ContentQuota: demo data #4060 (#4071)

* [fix] cms ContentQuota: demo data #4060

* [fix] cms ContentQuota: demo data setting content quota #4060

* [modify] create demo data for group_ids & content_quota collectively

* [delete] item.add_to_set group_ids: @site.group_ids
sunny4381/shirasagi,shirasagi/shirasagi,shirasagi/shirasagi,sunny4381/shirasagi,shirasagi/shirasagi,ShinjiTanimoto/shirasagi,ShinjiTanimoto/shirasagi,shirasagi/shirasagi,sunny4381/shirasagi,sunny4381/shirasagi,ShinjiTanimoto/shirasagi,ShinjiTanimoto/shirasagi