Change success factor of twitter test script.
Change success factor of twitter test script.

Exit 0 if at least one hashtag-count exists in
the running web page; otherwise, return -1.

Script previously returned result of a kill cleanup
command, which was sometimes not 0.

Will this satisfy hudson's whimsical tyranny?

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