BROOKLYN-51

If no security properties are set and `--noConsoleSecurity` is not set then `BrooklynLauncher` configures the server to accept unsecured connections from `127.0.0.1` and secured external connections that are authenticated with the user `brooklyn` and a randomly generated password that is logged once. 

The new security filter checks the remote address of the request. I'm assuming that this can't be spoofed.