Insert test loop to execute chained commands

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@5090 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/ipmi.pm.2

@@ -5801,6 +5801,7 @@ sub donode {
       extraargs => \@exargs,
   };
   my ($rc,@output) = ipmicmd($sessiondata{$node});
+  while ($sessiondata{$node}->{ipmisession}->waitforrsp()) { yield };
   my @outhashes;
   sendoutput($rc,@output);
   yield;