VDM-112 Modified code to check the invalid user roles.
VDM-112 Modified code to check the invalid user roles.

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