New system level that includes reverse proxy configurations

[pcrespov]

Follows up from #6512

• increase coverage on cookies module
• setup test with entire stack (system test similar to tests/swarm-deploy
  • test auth middleware
    • test access to vendor w/ or w/o login
    • test uses having access to multiple products
  • test routing
    • reaches public-api
    • reaches web-api
      • product middleware