Daylight saving time issue in CronExpression

[poutsma]

Expressions set on the exact hour of a daylight saving time (such as "0 10 2 * * *" in timezone Central Europe) result in a null value being return for next, when passing a time before the turnover (for instance, 01:09:00).

This issue seems to be caused by the fix for #26744.

/cc @sbrannen