Add ansible `prod` group in CRI_XCBC prod branch
To make it easier to manage group vars on Cheaha. Make a prod
group that uses group_vars/prod
instead of having conflicts on group_vars/all
all the time.
To make it easier to manage group vars on Cheaha. Make a prod
group that uses group_vars/prod
instead of having conflicts on group_vars/all
all the time.