Make Status Change Dates a Datetime

[SteeltownRiot]

Often times for various reasons a status change occurs on the same date a few minutes or a few hours apart. JIRA stores these status changes as a datetime so it would be useful if the property of the variable in the tool extracting these changes be changed to a datetime as well.

Being able to report that a team's average time an issue spends between submission and open is 80 minutes and showing it improved from 1 hour and 20 minutes the year before is far more useful than it was less than 24 hours last year and remains less than 24 hours now.