@Test
  public void testConstructor1() {
    final MemberDataBuilderImpl builder = MemberDataBuilderImpl.newBuilder(null, null);
    builder.setVersionOrdinal(unknownVersionOrdinal);
    validate(builder.build());
  }
MemberData has to be able to hold an unknown version ordinal since, during a rolling upgrade,
we may receive a MemberData from a member running a future version of the product.
geode-membership/src/integrationTest/java/org/apache/geode/distributed/internal/membership/gms/GMSMemberDataVersionJUnitTest.java