Default app root path on BaseDaemon::toCommand

[DavidMikeSimon]

We have to pass in root path because this is a static method and so it can't technically reach container. However, 99% of the time it'll be using the expected app/console location, so we should set that static variable somewhere on bundle initialization and make it the default. Or maybe earlier? What if they try toCommand before they do get(group) for some reason?