Fixed the bug of displaying error message in console while browsing SQL tab.
Fixed the bug of displaying error message in console while browsing
SQL tab.

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