fix log-statement of large rolloutgroup (eclipse-hawkbit#362)

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/rollout/condition/StartNextGroupRolloutGroupSuccessAction.java

@@ -64,7 +64,8 @@ private void startNextGroup(final Rollout rollout, final RolloutGroup rolloutGro
             // get all next scheduled groups and set them in state running
             rolloutGroupRepository.setStatusForCildren(RolloutGroupStatus.RUNNING, rolloutGroup);
         } else {
-            logger.info("No actions to start for next rolloutgroup of parent {}", rolloutGroup);
+            logger.info("No actions to start for next rolloutgroup of parent {} {}", rolloutGroup.getId(),
+                    rolloutGroup.getName());
             // nothing for next group, just finish the group, this can happen
             // e.g. if targets has been deleted after the group has been
             // scheduled. If the group is empty now, we just finish the group if