uranium: add IPv6 entries

ganglia.wikimedia.org is an alias for uranium.wikimedia.org.
uranium.wikimedia.org has address 208.80.154.53

@uranium:~# ip a s | grep inet6
inet6 2620:0:861:1:208:80:154:53/64 scope global

and minimal indentation fixes

Change-Id: I62dfd47904a8bae6d62cf697ada0805df6df6cd1
RT: 8446
Merge "uranium: add IPv6 entries"