Fixes #14 Drops and recreates table when if it exists during initializing only if setClearZookeepers = true in configuration.

...g only if setClearZookeepers = true in configuration.

The more I thought about this, I think the best option is to drop and recreate the table when setClearZookeepers() is enabled and fail otherwise (with the table already exists exception).

maybe this should be ```boolean allow```.  clear might be confusing to users that don't know the history of this property.