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
