Fix so that builder works even when system time zone isn't UTC.
Fix so that builder works even when system time zone isn't UTC.

git-svn-id: f006de162d12fc03047ad8e9e03b9a7c8d48a8a3@1499 1e1cfbb7-5c0e-0410-a2f0-f98d92ec03a1

hugojosefson/joda-time