-Fix problem where requests were sent to backup service nodes when a request is sucessfully dispatched

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2838 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/sbin/xcatd

@@ -973,7 +973,9 @@ sub dispatch_request {
 	            dispatch_callback({error=>["Unable to dispatch command to ".$ENV{XCATHOST}.", command will not make changes to that server ($errstr)"],errorcode=>[1]}); 
 	            xCAT::MsgUtils->message("S","Error dispatching request: ".$errstr);
                 next;
-	        }
+	        } else {
+                last;
+            }
          } else {
             $$progname.=": locally executing";
             $SIG{CHLD}='DEFAULT';