[#5225] Fix spec failure that depended on time change

Turns out that:

zero = Time.now # Reset the current time to X:00:00
current = zero - (zero.hour * 3600) - (zero.min * 60) - zero.sec

current is actually 1am on a day where the time falls back (Nov 7th),
not midnight as the test expected.

Reviewed-by: Paul Berry <paul@puppetlabs.com>