[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.
What is OpenShift specific about this work?  It doesn't expose any APIs, nor does it seem to need to be in the origin source tree.  Why would openshift-dns be bound as part of OpenShift? 

Why do we have to run our own DNS server?  Why wouldn't have customers give us an assigned wildcard?