XD-2322 Add setter for replicationFactor

* Add setter method
* Configure in kafka-bus.xml
XD-2228 - Prompt for password if no value is provided in the command line

* If there is no value provided for the `--password` parameter, the shell will prompt the user to type one, avoiding its display in cleartext on both screen and log;
* UserInput has been refactored, by renaming the original `prompt` method to `promptWithOptions`, and introducing a `prompt` method for freeform input`
* Added tests simulating user input
XD-2325 Set auto-startup to false in Kafka source
XD-2315 UI: Add support for stoppable notifications

* Update `angular-growl` to `angular-growl-2`
* Ensure Growl messages are shown nicely on small devices as well