Add a rake task to create missing workers for running scrapers
Add a rake task to create missing workers for running scrapers

This is a horrible workaround so we don't have to manually remember how
to do https://github.com/openaustralia/morph/issues/910#issuecomment-154173978
every time this happens.

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