private void assertCollectionEquals(String message, Collection<? extends PartitionId> expected,
      Collection<? extends PartitionId> actual) {
    assertEquals(message, new HashSet<>(expected), new HashSet<>(actual));
  }
Asserts that elements in collection {@code actual} is equal to the ones in {@code expected} irrespective of
ordering.
@param message the message to print if they are not equal.
@param expected the expected elements
@param actual the actual elements
ambry-clustermap/src/test/java/com/github/ambry/clustermap/ClusterMapUtilsTest.java