Port REST specs to Java, phase 1

[jascks]

Description: To confidently be able to port over existing JavaScript REST APIs to Java, we need to ensure the existing spec tests continue to work against the newly converted API.

• Add a RestSpecTest that
  • Injects and uses a RestClient similar to ControllerTest
  • Can load JSON spec files from hedera-mirror-rest-java/src/test/resources/specs with arbitrary depths. For this phase 1 PR, a selected few spec files are choosen.
  • Model the spec JSON as a RestSpec POJO
  • For each spec, use DomainBuilder to create default and override with data from setup section and persist
  • Call the URLs and verify the response JSON and status codes
  • Temporarily add a hedera-mirror-rest test container to verify all specs pass against it

Related issue(s):

Fixes #6810

Notes for reviewer: This branch/PR is a step back from the branch 6810-port-rest-specs-to-java which contains additional functionality regarding additional DB entity types for setup. That will be the basis for follow on work to build on this phase 1 PR.

Checklist

• [ ] Documented (Code comments, README, etc.)
• [x] Tested (unit, integration, etc.)