ENG-7874: Eliminate race caused by stats agent being initialized too early.
ENG-7874: Eliminate race caused by stats agent being initialized too early.

Enable the stats agent after all system components are constructed to
avoid stats request handling racing with the construction of the
sub-systems.

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