title: Kafka Streams: Internal topic partitions
body: <p>Kafka version: 1.0.0 <br>
  Let's say the stream application uses low level processor API which maintains the state and reads from a topic with 10 partitions.  Please clarify if the internal topic is expected to be created with the same number of partitions OR is it per the broker default.  If it's the later, if we need to increase the partitions of the internal topic, is there any option?</p>