Given the volume and ephemeral nature of the nodes we are running jobs
on, we're interested in raising the minimum TTL to ensure we're not
needlessly querying domains all the time.
Some domains such as github.com or fedoraproject.org have low TTLs and
we suspect there is a correlation between their low TTLs and the fact
that we're seeing increased DNS lookup rates for these domains.
Change-Id: I6d9656cb07a694fc2f54f256a63af814c034ffb8
f795128f21