ENG-4126: ret dupe cntr response not last message
ENG-4126: ret dupe cntr response not last message

When the duplicate counter is complete, return the real
response not just the most recently received message,
which might be a REJOINING indicator.

r=izzy

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