DO NOT MERGE - Show the differences needed to get working + integrated with ES/Kib

[AlexP-Elastic]

Related: https://github.com/elastic/cloud/issues/11401

To run this branch (eg in a VM):

• Add idptestbed to the /etc/hosts
  • (eg as one of the internal IPs of the host - would need to change that in a few places to get it working as something externally addressible)
• In the top-level directory:
  • run docker-compose build (first time/after any changes to the config files)
  • docker-compose up (subsequent times)
    • (note that I had to docker compose rm after CTRL+Cing)
• In the elasticsearch testbed directory:
  • docker-compose up
• Then bring up a browser on the VM and navigate to http://idptestbed:5601 to login to Kibana (https://idptestbed will take you to the default IDP testbed)
  • Login as any username, with the same password
    • (eg alex/alex authenticates, alex/banana doesn't)
  • note that I didn't add any groups so this only shows authentication as uid: 1
    • You can change code in dummy-jaas-loginmodule to add other attributes (which then need to get added to the attrbute resolver, eg, (principalAttributeName is the name it's been given in dummy-jaas-loginmodule)

[AlexP-Elastic]

(this is just a copy of the idp-metadata.xml from the IDP image)