@Test
  public void testReadBadZNRecordCase2() throws Exception {
    ZNRecord zNRecord = makeZNRecordWithSimpleField(null, "key", "value");
    updateAndWriteZNRecord(zNRecord, true);
  }
Tests reading {@link ZNRecord} from {@link HelixPropertyStore}, where the {@link ZNRecord} has an irrelevant
simple field ("key": "value"), but ("accountMetadata": someValidMap) is missing. This is a good {@link ZNRecord}
format that should NOT fail fetch or update.
@throws Exception Any unexpected exception.
ambry-account/src/test/java/com/github/ambry/account/HelixAccountServiceTest.java