[FIX] Room creation error due absence of subscriptions

[tassoevan]

Fixes the following error:

Uncaught TypeError: Cannot read property 'name' of undefined
    at roomList.js:127
    at callbacks.js:97
    at Array.reduce (<anonymous>)
    at Object.RocketChat.callbacks.run (callbacks.js:88)
    at Streamer.<anonymous> (cachedCollection.js:340)
    at ev.js:11
    at Array.forEach (<anonymous>)
    at Streamer.emit (ev.js:11)
    at StreamerCentral.<anonymous> (client.js:66)
    at ev.js:11