* Commits:
  style: Cleanup whitespace
  style: Alphabetize some imports
  docs: Add and cleanup comments
  style: Rename variables to mark as CONSTANT
  refactor: Remove unused test factory
  refactor: Move RequestFactoryNoCsrf helper to common/
  refactor: Move OrgInstructorFactory helper to common/
  refactor: Move OrgStaffFactory helper to common/
  refactor: Move BetaTesterFactory helper to common/
  refactor: Move InstructorFactory helper to common/
  refactor: Move UserFactory helper to common/
  refactor: Move StaffFactory helper to common/
  refactor: Move GlobalStaffFactory helper to common/