@Override
    public void logDatabaseContents(final Txn<ByteBuffer> txn) {
        logRawDatabaseContents(txn, LOGGER::debug);
    }
Dumps the contents of this database to the logger using the key/value
serdes to de-serialise the data. Only for use at SMALL scale in tests.
stroom-lmdb/src/main/java/stroom/lmdb/AbstractLmdbDb.java