@Override
    public Optional<RegionObserver> getRegionObserver() {
      return Optional.of(this);
    }
Test that when bypass is called, we skip out calling any other coprocessors stacked up method,
in this case, a prePut. If the column family is 'test', then bypass is invoked.
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverBypass.java