Do not have heat to connect to external service

The test_templates_negative haves heat to connect to an external
service. www.example.com is a registered exisitng domain,
and it also has an AAAA record.

This negative tests have heat to download a `template` from the
example.com .

If you have IPv6 local network, but you do not have a real outside
connectiviy over IPv6 this test tooks a lot of time (~2 minute).

Tempest should not have hardcoded urls for anytinhg,
what the services will use.

This change simply removes the host name from the `bad` urls,
to be deterministicly bad.

Alternatively would be adding extra config options.

Change-Id: Ib198164e544a2bf8426778e39bb616aaa468087c
1 file changed