smoketest.py: Fix bug in handling of --servers argument
smoketest.py: Fix bug in handling of --servers argument

gaoning777/logcabin,tempbottle/logcabin,gaoning777/logcabin,TigerZhang/logcabin,logcabin/logcabin,chaozh/logcabin,TigerZhang/logcabin,nhardt/logcabin,logcabin/logcabin,chaozh/logcabin,TigerZhang/logcabin,logcabin/logcabin,nhardt/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,nhardt/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,chaozh/logcabin,tempbottle/logcabin,tempbottle/logcabin,gaoning777/logcabin,nhardt/logcabin,dankenigsberg/logcabin,chaozh/logcabin,gaoning777/logcabin,tempbottle/logcabin,logcabin/logcabin