Add disaggregation usage
Created by: cschloer
Add usage_type so the engineers can choose what type of disaggregation to do.
To test, run all of the services with new buildingservice and new buildings. Add a new account and select the usage_type. Either fetch the bill or upload the bill.
https://www.pivotaltracker.com/story/show/146009835
All PRs in this series:
https://github.com/Blocp/utilityservice/pull/45 https://github.com/Blocp/buildings/pull/71 https://github.com/Blocp/oltp/pull/32