fix(socketio): fix for socket handshake property change

The ```socket.handshake.address``` property changed right in socket.io (https://github.com/Automattic/socket.io/commit/54726105cbab5acba3176fbc11b7af06508d2d52) right around the time it was changed here (https://github.com/DaftMonk/generator-angular-fullstack/pull/369).