Update versions in libraries (#2543)

* Bump datanucleus versions

* Update HikariCP

* Update Hoverfly-java

libraries/src/test/java/com/baeldung/date/DateDiffUnitTest.java

@@ -28,17 +28,6 @@ public class DateDiffUnitTest {
         assertEquals(diff, 6);
     }
 
-    @Test
-    public void givenTwoDatesInJava8_whenDifferentiating_thenWeGetSix() {
-        LocalDate now = LocalDate.now();
-        LocalDate sixDaysBehind = now.minusDays(6);
-
-        Duration duration = Duration.between(now, sixDaysBehind);
-        long diff = Math.abs(duration.toDays());
-
-        assertEquals(diff, 6);
-    }
-
     @Test
     public void givenTwoDateTimesInJava8_whenDifferentiating_thenWeGetSix() {
         LocalDateTime now = LocalDateTime.now();