missing A entries for LVS Ethernet interfaces

syslog is full of ssh reverse mapping errors such as:

sshd[8386]: reverse mapping checking getaddrinfo for
vl1019-eth2.lvs1003.wikimedia.org [10.64.33.3] failed - POSSIBLE
BREAK-IN ATTEMPT!

This patch adds in the missing entries based on the PTR entries in
10.in-addr.arpa

RT: #4811
Change-Id: Ib02c82bdcf1049e0cbcd70f58f29b0bcd380b05e
Merge "missing A entries for LVS Ethernet interfaces"