Cal ISO: allow instruction level data to use batch level start time
allow instruction level data to use batch level start time. Add an option to allow this. use case: the instruction level start time is the time when the DOT should be ramped up or down. The batch start time is a few minutes before that timestamp. To get the turbines adjusted in time, they need to use the batch start time. This gives the operator enough time to adjust the set point and have the new target met by the instruction start time.