ENG-13517: Fix floating point serialization in python client
ENG-13517: Fix floating point serialization in python client

VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,VoltDB/voltdb