Add an environment variable to allow forcing either the stateful or the
stateless authenticate flow.
Split the existing integration test clusters "single" and "multi" into
four new clusters: "single-stateful", "single-stateless",
"multi-stateful", and "multi-stateless", so that the integration tests
will run for both the stateful and the stateless authenticate flows.
(The "kubernetes" cluster is not currently being run, so I've left it
alone for now.)
Update the integration test libsonnet templates to assign a fixed IP
address to the trusted-httpdetails service. This requires also assigning
a fixed IP subnet to the docker network.
Configure a route with a 'to' URL using https and this fixed IP address.
Add a corresponding certificate with the IP address. Finally, add a test
case that makes a request to this route.
* integration: use postgres instead of redis for tests
* add missing environment variables for kubernetes
* fix certs
* use cert in generated files
* try new keys
* fix certs
