Task: reevaluate-cdc-time

This task is to update the current value of the countdown clock in the situation model. This task is selected when the value is known but thought to be possibly out-of-date; the determine-cdc-time task is selected instead when the time is completely unknown.

The task is initiated by productions in launch.soar6, but is executed by ones in read-cdc.soar6. It should probably be initiated in follow-omi-procedure instead, but right now it just triggers off the wait operator in the top space.