Return login timeout so clients know when the token will expire

[BryceStevenWilley]

Right now, calls to /authentication only return something that looks like this:

{"tokens":
    {
    "TYLER-ID-ILLINOIS":"12345678-abcd-1234-5678-...",
    "TYLER-TOKEN-ILLINOIS":"you@example.com:87654321-4321-dcba-..."}}

Should be able to easily add timeout and other things that Tyler returns to us on a login call to this, so clients know when the user will be timed out and don't have to make extra calls to Tyler to check that.