stat1010: stats group -> analytics user group

puppet error on stat1010:
Error 400 on SERVER: stats is not a valid group name

talked to Chase,
like on 1026 this should be the analytics user group instead

Change-Id: Ia74f580c770cc245f6f4d082e37c85da52f179e6
Merge "stat1010: stats group -> analytics user group" into production