fix TestStatsAgent for increased pending ops.
fix TestStatsAgent for increased pending ops.

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