add TwoPrediate function to hybrid_index_test.cpp
add TwoPrediate function to hybrid_index_test.cpp

ranxian/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,ranxian/peloton,ranxian/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,ranxian/peloton,amaliujia/CMUDB-peloton,ranxian/peloton