DateList example fails

The oozie/examples/src/main/java/org/apache/oozie/example/DateList.java produces a wrong action output:

,2009-02-01T01:15Z,2009-02-01T01:30Z,2009-02-01T01:45Z,2009-02-01T02:00Z

instead of

2009-02-01T01:00Z,2009-02-01T01:15Z,2009-02-01T01:30Z,2009-02-01T01:45Z

• the first element is missing in the list (but not the separator). This is caused by an off-by-one error introduced in OOZIE-2942.