Try catch around all network calls

Network-try-catch

// att & atc are defined in Netsession.h

try {
    netDataPathClientSession *sessionCtx = getClientSession<> ... (); ...
    boost::shared_ptr<FDSP_DataPathReqClient> client = sessionCtx->getClient();
    client->GetObject or any network call
} catch(const att::TTransportException& e) {
    LOGERROR << "error during network call : " << e.what();
}
        
// if you are tracking the error countt        
if (errcount >= int(ceil(numNodes*0.5))) {
	LOGCRITICAL << "Too many network errors : " << errcount ;
        return ERR_NETWORK_TRANSPORT;
}