Update data for spring 2020 and disable races views

[jeancochrane]

Overview

Add new data for Spring 2020. In addition, remove the "Races" views and links from the site and remove lobbyists from the homepage, per Marjorie's request.

Testing instructions

• Rerun the import with python manage.py import_data
• Redo the search index with python manage.py make_search_index
• Run the dev server with python manage.py runserver
• Visit http://localhost:8000 and confirm that the "Races" tab no longer appears
• Visit http://localhost:8000 and confirm that only candidates and committees are displayed on the homepage
• Visit http://localhost:8000/races and confirm it returns 404
• Visit http://localhost:8000/candidates/michelle-lujan-grisham-2243/ and confirm you don't see the "Races" section above "Past campaigns"

[derekeder]

this all checks out on staging! https://nmid.datamade.us

Good to deploy