Triggers should not be excluded based on the fire time of the first selected trigger

Fixes #131.

This commit corresponds with commit 2226 from quartz java -- "DEV-9254 : no reason we should be excluding triggers based on the fire time of the first selected trigger" which is in both the 2.2.x and 2.1.x branches.

Is there a way to pull request for this change to go into the 2.1.x line?