ENG-4653: More review feedback: Use EnumMap
ENG-4653: More review feedback: Use EnumMap

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