ACCUMULO-3089: Create volume chooser from table properties

Sorry, I wasn't very clear. The difference being "choose from available volumes provided" and "choose from volumes set in a table property". They can definitely both share the same "choose random" code, but, in the end, they do two different things. I don't see a reason to make the `RandomVolumeChooser` do both of these (tell me one if I'm missing it).