For ENG-6245, fix memory leak in test case
For ENG-6245, fix memory leak in test case

zuowang/voltdb,zuowang/voltdb,VoltDB/voltdb,deerwalk/voltdb,ingted/voltdb,creative-quant/voltdb,ingted/voltdb,wolffcm/voltdb,wolffcm/voltdb,wolffcm/voltdb,paulmartel/voltdb,creative-quant/voltdb,paulmartel/voltdb,ingted/voltdb,wolffcm/voltdb,ingted/voltdb,creative-quant/voltdb,deerwalk/voltdb,zuowang/voltdb,paulmartel/voltdb,zuowang/voltdb,paulmartel/voltdb,migue/voltdb,deerwalk/voltdb,zuowang/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,wolffcm/voltdb,flybird119/voltdb,simonzhangsm/voltdb,flybird119/voltdb,paulmartel/voltdb,flybird119/voltdb,kumarrus/voltdb,flybird119/voltdb,VoltDB/voltdb,migue/voltdb,creative-quant/voltdb,wolffcm/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,deerwalk/voltdb,paulmartel/voltdb,deerwalk/voltdb,ingted/voltdb,flybird119/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,migue/voltdb,kumarrus/voltdb,kumarrus/voltdb,migue/voltdb,wolffcm/voltdb,VoltDB/voltdb,flybird119/voltdb,migue/voltdb,kumarrus/voltdb,VoltDB/voltdb,creative-quant/voltdb,creative-quant/voltdb,VoltDB/voltdb,ingted/voltdb,creative-quant/voltdb,wolffcm/voltdb,paulmartel/voltdb,kumarrus/voltdb,kumarrus/voltdb,ingted/voltdb,migue/voltdb,kumarrus/voltdb,migue/voltdb,flybird119/voltdb,deerwalk/voltdb,migue/voltdb,deerwalk/voltdb,zuowang/voltdb,zuowang/voltdb,ingted/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,paulmartel/voltdb,flybird119/voltdb,zuowang/voltdb,simonzhangsm/voltdb