Simplify factories.Group(): don't add creators as members #983

Job	Run time
Docker Hub / Release	1m 13s
Staging (WebSocket) / Deploy	3m 46s
Staging / Deploy	4m 7s
Production / Deploy	3m 50s
Production (Canada) / Deploy	4m 3s
Production (WebSocket) / Deploy	3m 57s
	20m 56s

Provide feedback