The ipallocator for the new IPAddress object use the golang big.Int
library for some math operations, like adding an offset to an IP
address.
We use the bytes array to convert between big.Int and IP addresses,
however, IP addresses are always represented as 4 or 16 bytes arrays.
Big int bytes representations just return the byte array until the
most representative number, this requires that we need to prepend
these extra bytes for IPs with leading zeros.
Change-Id: I9d539f582cae1f9f4e373b28c5b94d7a342f09c7
Signed-off-by: Antonio Ojea <aojea@google.com>
e4f93d8a82