"Iterator List" should return single message response containing an array.

[badtuple]

"Iterator List" and "Log List" respond in different ways right now.

Log List returns a single message. Within that message is a CBOR encoded array that contains the names of each Log.

Iterator List returns 1 message per Iterator. Each of those messages is a string representing the name of an Iterator.

For consistency, we should align on returning a single message, and convert Iterator List to work like Log List does.