See the commit that added round_away_from_zero for details.
IN the case of dashboard_data.py:
We don't first cast to decimal here because in python 2 this didn't do
anything. The python 2 rounding method would just cast things to float
before doing the rounding anyway so it just wastes cpu cycles. In
python 3 this causes some typing issues so just removing it.
9f9d904592