Steps to Reproduce:
1. Use the reserve workflow to request a system for 7 days
2. Be surprised when the system is reclaimed by Beaker after 4 days 3 hours.

Additional info:
/distribution/reservesys has always enforced a hard limit of 99 hours for the RESERVETIME. This is basically a Red Hat-specific attempt to limit excessive usage of limited lab resources.

However the reserve workflow page allows you to select a reservation time of up to 7 days.

At the very least, the max reserve time offered by reserve workflow should match the limit applied by /distribution/reservesys.

Ideally the limiting would not live in /distribution/reservesys at all (and indeed we are planning to make reserve workflow use <reservesys/> instead) so the maximum watchdog time limit should really be configured in Beaker, and reserve workflow should adjust itself accordingly.