ENG-1886: code review changes
ENG-1886: code review changes

 1. fix logical error (! should not be !).
 2. remove out of date comment.

r=aweisberg

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