Users and Permissions Test Plan

New server should allow admin/admin authentication
Cannot revoke "admin" user
Can add new user and that user has access
Can change user password and old password doesn't work while new one does work
All creds persist after server restart
Passwords not exposed in client or server heap dumps
Error messages when using incorrect credentials
Password change takes affect immediately
- Start connection with creds
- Change creds
- Subsequent client calls on that connection should not work (SecurityException should be thrown)