Revert "HAWQ-1342. Fixed QE process hang in shared input scan on segment node"
Revert "HAWQ-1342. Fixed QE process hang in shared input scan on segment node"

   The fix introduce hang regression in shared input scan query as described in HAWQ-1371

wengyanqing/incubator-hawq,lavjain/incubator-hawq,wengyanqing/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,huor/incubator-hawq,stanlyxiang/incubator-hawq,stanlyxiang/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,stanlyxiang/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,stanlyxiang/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,huor/incubator-hawq,wengyanqing/incubator-hawq,stanlyxiang/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,huor/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,outofmem0ry/incubator-hawq,stanlyxiang/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,stanlyxiang/incubator-hawq