Restore ExecDropSingleTupleTableSlot() to release the tuple slot we create in Peloton side. Seems not breaking.
Restore ExecDropSingleTupleTableSlot() to release the tuple slot
we create in Peloton side.
Seems not breaking.


Former-commit-id: 7b36f192dec869e2a3f9b5605159de856758c4aa
larryxiao/peloton-1,larryxiao/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,omegaga/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,larryxiao/peloton,ranxian/peloton,omegaga/peloton,larryxiao/peloton-1,larryxiao/peloton-1,ranxian/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,amaliujia/CMUDB-peloton,omegaga/peloton,larryxiao/peloton-1,larryxiao/peloton,larryxiao/peloton-1,omegaga/peloton,larryxiao/peloton,ranxian/peloton,larryxiao/peloton-1,ranxian/peloton,larryxiao/peloton