Upgrading Koryphe to Java 11 will allow us to keep up with the Java LTS version and leverage some of the new features in post-Java 8 versions such as better integration with container technologies, the JShell and new language features.

Modularisation of Koryphe is not in scope for this ticket. A new ticket will be raised for this once the upgrade has occurred.

Related to Gaffer issue: gchq/Gaffer#2300