[Completes #48678351 #48664209] Remove references to 'Team MyUSA'; change default FROM address to projectmyusa@gsa.gov.
Re-add email address to Profile API.
[Completes #49093181] User's accounts lock after 5 failed login attempts
[Completes #49095141] Users see error message if password is less than 8 characters.
[Completes #49096315] Users can't sign up with a weak password
[Completes #49141361] Remove token_authenticatable option from User
[Completes #49164647] Store session information in the database, not in cookies
[Completes #49289277] Developers can specify an API version
Remove apps from API routes.
[Completes #49789089] Remove rails_admin