Fix makeconfluentcfg -d

makeconfluentcfg -d erroneously would exit after only considering
the first possible node.  Allow it to iterate over all the
confluent nodes seeking a match.

xCAT-server/lib/xcat/plugins/confluent.pm

@@ -395,8 +395,8 @@ sub donodeent {
             if ($cfgenthash->{$confnode}) {
                 $confluent->delete('/nodes/' . $confnode);
             }
-            return;
         }
+        return;
     }
     my @toconfignodes = keys %{$cfgenthash};
     my $ipmitab       = xCAT::Table->new('ipmi', -create => 0);