DEICH-6264 - Euler - upgrade to Java 17
Commits: DEICH-6264 - CR fixes
DEICH-6264 - Upgraded to Spring Boot latest stable - 2.7.2 + jsonld-java
DEICH-6264 - RIP springFox (🪦
DEICH-6264 - First steps to upgrade to Java 17
Quite a lot of dependencies had to be upgraded. Java 11 is from 2018, and a lot has happened in 4 years. -Upgraded Spring boot, and numerous third party libraries required by upgrade to Java 17. -Added @EqualsAndHashCode(callSuper=true) to no.deichman.euler.api.resource.jsonapi.vos.* classes. -Minor code improvements allowed by Java 17 and the Java language (like method ref, which was supported by Java 11 as well).