[WIP] [DO NOT MERGE] Router active active

Opening this up for feedback.  This branch contains a working example of round robin wild card DNS via BIND mapping to OpenShift routers.  Definitely needs improvements about how router configs are digested by the DNS container but didn't want to code that up yet if it wasn't on the right track.
I'll keep this branch handy then.  @abhgupta had a good idea about making the image a bit easier to work with via env vars that we can incorporate if we ever come back to it.