To developers, OSSTest is an essential automated testing and quality checking system for anyone submitting code to the Xen Project’s open-source hypervisor. But all software runs somewhere. In the Xen Project’s case it’s virtual server infrastructure inside in a featureless colocation datacenter just outside Boston. Unfortunately — extraordinarily even — it seems that this facility can no longer be used because of a “sudden shutdown” as an announcement on the Xen Project website this week explained it. “We received a notification from our colo facility provider Synoptek indicating the shutdown…