Added Thread.sleep to avoid issue with flacky test

src/test/java/it/inaf/oats/vospace/JobServiceTest.java

@@ -205,6 +205,12 @@ public class JobServiceTest {
         verify(moveService, timeout(1000).times(1)).processMoveJob(any(), any());
 
         verify(jobDAO, timeout(1000).times(3)).updateJob(any(), any());
+
+        try {
+            Thread.sleep(500);
+        } catch (InterruptedException ex) {
+        }
+
         assertEquals(ExecutionPhase.EXECUTING, phases.get(0));
         assertEquals(ExecutionPhase.EXECUTING, phases.get(1));
         assertEquals(ExecutionPhase.COMPLETED, phases.get(2));