Adaptive Questionnaire path-based routing

[c0c0n3]

This PR improves the basic Adaptive Questionnaire deployment of #217.

• AQ got upgraded to version 1.6.3 which includes some bug fixes, most notably Can't use SpringBoot base URL IDSIA/adapquest#25. This fix enables us to use URL path based routing.
• Routing. We ditched the node port setup of Adaptive Questionnaire deployment #217 and are now using the usual path-based approach, implementing a URL-path route /aq to deliver external HTTP requests to the AQ service.
• Istio sidecar. This PR puts back the Istio sidecar that Adaptive Questionnaire deployment #217 removed. In fact, Adaptive Questionnaire redirect chops off port #216 isn't an issue anymore with URL-path routes.

[c0c0n3]

Demo

• Log into ArgoCD (https://kitt4sme.collab-cloud.eu/argocd) and check out the new Adaptive Questionnaire app.
• Browse to the Adaptive Questionnaire home page: https://kitt4sme.collab-cloud.eu/aq
• Hit the "Go to Demo" button.
• Take the Alloy survey.
• Check the data in the Postgres DB. (Replace * with the Adaptive Questionnaire DB user's password.)
  • kubectl port-forward svc/postgres 5432:5432
  • psql postgres://ada:*@localhost/adaptive
  • \dt
  • select * from "Answer";

[c0c0n3]

@vcutrona please test thoroughly, we still have time to squash any bugs before review day. W/r/t the previous version deployed by #218, I've found these issues:

• Alloy demo survey charts IDSIA/adapquest#30
• AdapQuest-Example internal server error IDSIA/adapquest#31

@karikolehmainen thanks to this PR we don't need port 8443 anymore. But if you could please still keep it open just in case we've got to rollback.

[vcutrona]

@c0c0n3 I tested the AdapQuest deployment.
I experienced the same issues as you, but in addition, the Alloy demo does not provide the questionnaire we need in K4S (it is a different survey).
The deployment should come with an Excel file that contains the right set of questions. I can provide you with the Excel file.

Also, it seems the authentication with Keycloak is missing in this version/deployment.

[c0c0n3]

@vcutrona thanks for testing!

provide the questionnaire we need in K4S

yes, this is a demo rollout, when you guys are ready with the actual Kitt4sme questionnaire we'll configure AQ to use that questionnaire instead of the demo ones---see notes in #217 about configuration.

authentication with Keycloak is missing in this version/deployment.

Correct, see #218 and #217 about it :-)