JDK 17 (LTS) Release

[gazbert]

Get bot building and running on Java JDK 17 (LTS).

TODO:

• [x] Re-enable all Maven unit tests.
• [x] Re-enable all Gradle unit tests.
• [x] Maven coverage @ 80% target (excl. Powermock tests).
• [x] Gradle coverage @ 80% target (excl. Powermock tests).
• [x] Complete all JDK 17 related FIXMEs and TODOs in code.
• [x] Sonar fixes.
• [x] Remove defunct itBit exchange adapter - Paxos killed off the itBit REST API on 26 April 2023: https://api.itbit.com/doc
• [x] Fix missing "org.springframework.cloud.context.restart.RestartEndpoint' issue.
• [x] Live exchange test with Maven bot distro.
• [x] Live exchange test with Gradle bot distro.
• [x] PR.
• [ ] Release.

[gazbert]

Released.