GH-1763 - Ensure final fields of immutable entities are persisted correctly.

The underlying issue has been fixed with Neo4j-OGM 3.1.14, so all that
was left todo was enabling the existing test.

This closes #1763.

Author: michael-simons

spring-data-neo4j/src/test/java/org/springframework/data/neo4j/integration/constructors/PersistenceConstructorsTests.java

@@ -170,8 +170,7 @@ public void shouldHandleRelationshipInCtor() {
 		assertEquals("ADMIN", persons.get(0).getGroup().getName());
 	}
 
-	@Test
-	@Ignore("final fields are not supported by OGM for now")
+	@Test // GH-1763
 	public void shouldHandleFinalFields() {
 		PersonWithFinalName person = new PersonWithFinalName("foo");
 		pfnRepository.save(person);