-Change xen console method to use screen instead of cu, cu hangs too much

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2818 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/share/xcat/cons/xen

@@ -78,7 +78,7 @@ until ($dsthost and $speed and $dstty) {
     xCAT::Client::submit_request($cmdref,\&getans);
 }
 release_lock();
-exec "ssh -t $dsthost cu -s $speed -l $dstty";
+exec "ssh -t $dsthost screen -e ^]a -d -R -S serial-".$ARGV[0]."-cons -A $dstty $speed";
 
 #my $pathtochild= dirname($scriptname). "/";
 #exec $pathtochild."blade.expect $mm $slot $username $password";