Move bugdaystats to to status.openstack.org

The bugdaystats script still runs on old-wiki. Now that we've
brought the repo into -infra we can move it over.

Closes-Bug: #1172440

Change-Id: Id02e280ad7261b01b00f3fe0782bd39bcc8409f8
Merge "Move bugdaystats to to status.openstack.org"