Increase the scraper queue from 15 to 20 concurrent scrapers
Increase the scraper queue from 15 to 20 concurrent scrapers

Hoping to relieve the queue problem a bit:

https://github.com/openaustralia/morph/issues/923#issuecomment-145191762

And we should be able to quite comfortably handle this on the new
server.

openaustralia/morph,openaustralia/morph,openaustralia/morph,openaustralia/morph,openaustralia/morph,openaustralia/morph,openaustralia/morph