Add automated system tests

[aguibert]

Runs integration tests on Portfolio microservice using several Docker containers:

• Liberty
• DB2
• Mockserver (mocks external services such as the stock-quote service)

Run tests using mvn verify

Tests run in about 2 minutes on my machine. First run will take longer due to pulling necessary Docker images.

Summary of changes in this PR:

1. Added some test-scoped maven dependencies
2. Added AppConfig class defining test container topology/env
3. Added PortfolioServiceTest class for the actual Portfolio service tests
4. A bit of app-side cleanup:
   • changed to 1 JAX-RS Application. Multiple Applications is undefined by JAX-RS spec
   • made readiness endpoint not require a JWT
   • Converted Portfolio object to use JSON-B instead of JSON-P
   • used @RegisterRestClient(baseUri = "...") for defaults instead of jvm.options
   • cleaned up JWT config by removing web.xml and using @RolesAllowed annotations instead

[jwalcorn]

Per Andy today:

[jwalcorn]

Just checking back in on this. I think MicroShed has matured some since we last touched base. Can this PR be fixed up and submitted for review now?

[aguibert]

hi @jwalcorn, yes MicroShed has matured quite a bit since the original PR, but there is still one more important design aspect that I'd like to solve before it's ready for prime time

[jwalcorn]

OK, checking back in on this again. Are you still interested in delivering this? Of course, some of the files originally touched have evolved since 2019. FYI, I just moved everything up to 22.0.0.6 and Java 17. Anyway, let me know - thanks!