Update iotcloud-cf.js for multiple hosts
Update iotcloud-cf.js for multiple hosts

This code change, allows multiple broker hosts, in Bluemix, one for staging and the other for production. It checks for the presence of the broker host.
ibm-messaging/iot-nodered,ibm-messaging/iot-nodered,ibm-watson-iot/iot-nodered,ibm-watson-iot/iot-nodered