Use files.openstack.org instead of git.openstack.org for traceroute
test.
Update use-cached-repos tests to use new orgs.
Update fetch-zuul-cloner to use opendev.org as path, fix a typo.
Continue to use the legacy names since fetch-zuul-cloner is a legacy
tool.
Change-Id: Ia57bda9e6a36e3c98a28382c19703bc01fa8e8d9