Improve INITIAL_WORKFLOWS

I changed the URLs to what actually works in the prototype , e.g.
  /Flow:Special/User:Zomg&flow=discussion
doesn't work, but
  /Special:Flow/Sandbox?workflow=<discussionUUID>
does.

It's not perfect but an improvement.

Change-Id: I18210035fda63be6e7fe491ae7c3f911788b7a99
Merge "Improve INITIAL_WORKFLOWS"