VDM-115 Modified code to remove dependency on deprecated sets module and use built-in set function.
VDM-115 Modified code to remove dependency on deprecated sets module and
use built-in set function.

simonzhangsm/voltdb,simonzhangsm/voltdb,migue/voltdb,deerwalk/voltdb,VoltDB/voltdb,migue/voltdb,VoltDB/voltdb,deerwalk/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,migue/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,migue/voltdb,migue/voltdb,migue/voltdb,simonzhangsm/voltdb,migue/voltdb,migue/voltdb,VoltDB/voltdb,VoltDB/voltdb,deerwalk/voltdb,deerwalk/voltdb