@Override
  public boolean equals(Object o) {
    return super.equals(o);
  }
Since {@link DistributedSystem#connect} guarantees that there is a canonical instance of
<code>DistributedSystem</code> for each configuration, we can use the default implementation of
<code>equals</code>.

@see #sameAs
geode-core/src/main/java/org/apache/geode/distributed/internal/InternalDistributedSystem.java