Set the trigger time consistently

[Joe-Heffer-Shef]

bee_track/bee_track/trigger.py

Line 82 in 0f96572

triggertime = time.time() # TODO Why are these two different?

Instead of

triggertime = time.time()  # TODO Why are these two different?
triggertimestring = datetime.datetime.now()

can we do

triggertimestring = datetime.datetime.now()  # need to convert to string later
triggertime = triggertimestring.timestamp()