Remove exception catch and report in fetchdatafromdbstore from iopool so that first time message server fetch doesn't report exception
Remove java_setting in config file, which is never and impossibly used
change logback level; specify log back config in test app start script
extend start timeout to 1 min
disable uniupdater and report error if app reports
Fix 2 bugs: 1. muscliest in MUCluster needs to be updated when message server changes; 2. not keep writing db store when message server changes
Remove httpcliient for now since HttpClients.createDefault() fails sometime. Need to figure out reason before reuse it.