Add Automated Tests for Other Data Scripts

[alexkcode]

Building off of #41, we would like to refactor and add test suites for the rest of the python scripts:

• src/data/scripts/add_context_by_property_type.py
• src/data/scripts/building_utils.py
• src/data/scripts/clean_and_pare_down_data_current_year.py
• src/data/scripts/process_data.py

Which should then test the following things (or at least the data backend of these features):

• Buildings rendering properly with a wide variety of properties (new data, old data, with district chilling, without, with natural gas use an without)
• Validating our data process works properly and generates correct calculations (we could make a small test CSV with 100 buildings and check calculations)

[gaylem]

@alexkcode Is this something you're planning on doing? I'd be interested in helping either way. I don't know much about testing but I'd like to learn! Let me know!

[alexkcode]

@alexkcode Is this something you're planning on doing? I'd be interested in helping either way. I don't know much about testing but I'd like to learn! Let me know!

@gaylem hey! if you're on tonight I can go over this with you, otherwise let's connect sometime on Slack about it.

[gaylem]

@alexkcode hey let's about it next Tuesday! The Docker stuff is done so I'm looking for my next mission :)