4a473da7fe
Currently the heat charm instance runs heat-api and heat-engine services or heat-api-cfn or heat-engine services. Change heat charm to deploy heat-api, heat-api-cfn, heat-engine containers. Change the ingress relation to use traefik-route interface instead of ingress interface so that the traefik configuration for heat-api and heat-api-cfn serive can be written by charm. Add heat-api-cfn pebble container handler and update service endpoints accordingly. Remove heat-config interface and corresponding handlers. Change-Id: I391f8d4ffefcebdb2423fcc1947590ca906d711a