Disable vexxhost due to job timeouts
Disable vexxhost due to job timeouts

We seem to have a lot of jobs being slow enough to hit timeouts when
running on vexxhost, disable them for now.

Change-Id: I87d7f17840ce52904fb87c4c74ea153952aa3e7f

openstack-infra/project-config,openstack-infra/project-config