Save bills to database
Created by: cschloer
Use with buildings pr https://github.com/Blocp/buildings/pull/56 and oltp pr https://github.com/Blocp/oltp/pull/21
This PR does a slight refactor of utilty service as well as adding new functionality. The "bills" endpoint was changed to "scrape" endpoint. Bill data is now being saved in the database through the "bill" endpoint.
Bill view was added though it is not being used yet. In the future it would be good if buildings front end called bills and disaggregated_bill endpoints directly. Instead it currently uses the account endpoint to get all of the data for each account