[spike] use streaming JSON to append information to the 'Running setup' phase

[anjannath]

The o/p is getting appended to the logview section, it doesn't show the progress bar with progress animation, instead it just appends to it

[gbraad]

Aren't we supposed to use ndjson or some other form of streaming information to show the steps taken?

[gbraad]

http://ndjson.org/libraries.html