Functional test of room server

[alexjball]

Make a test that makes test requests to a running room server to simulate a user session, and validate the media and control streams. For the media stream, we can test that the stream parses. For the control stream, we can hardcode some VNC commands or, if noVNC can run in Node, we can use an RFB to establish a connection and send commands.

The test runs against an arbitrary room server, so it should be useful for development and in CI. in CI, it should run against either a test env in CD or in a room server deployed inside the Travis Ubuntu 18.04 env. The advantage of the latter is that PR builds would test changes to the server.