Fix NOAA hourly forecast

[dchassin]

This PR fixes issue #1050

Current issues

None

Code changes

• Change NOAA property retrieved from "forecast" to "forecastHourly" in python_extras/noaa_forecast.py
• Fix default output of CSV to /dev/stdout in python_extras/noaa_forecast.py

Documentation changes

None

Test and Validation Notes

Get the forecast and observe whether it makes sense, especially in the morning.

Try the following to quickly check the result:

gridlabd noaa_forecast -p=37.5,-122.2 | gridlabd plot -i=/dev/stdin -o=/tmp/test.png --plot:grid --show