Fix error in parsing vnode names. Tweak a few error messages.

protogeni/lib/GeniCM.pm.in

@@ -2586,7 +2586,7 @@ sub SliverWorkAux($$$$$$$)
 
 	my $node = GeniUtil::LookupNode($vnode_id);
 	if (!defined($node)) {
-	    $message = "Bad vnode_id $resource_id";
+	    $message = "Bad vnode_id $vnode_id";
 	    goto bad;
 	}
 
@@ -2835,6 +2835,7 @@ sub SliverWorkAux($$$$$$$)
 	my $vnode_id      = GeniXML::GetVnodeId($ref);
 	my $virtual_id    = GeniXML::GetVirtualId($ref);
 	my $manager_id    = GeniXML::GetManagerId($ref);
+
 	my $inaggregate   = 0;
 	my $sliver;
 
@@ -2865,7 +2866,7 @@ sub SliverWorkAux($$$$$$$)
 
 	my $node = GeniUtil::LookupNode($vnode_id);
 	if (!defined($node)) {
-	    $message = "Unknown vnode_id in ticket: $resource_id";
+	    $message = "Unknown vnode_id in ticket: $vnode_id";
 	    goto bad;
 	}
 	# Must do this after mapper has run

protogeni/lib/GeniXML.pm.in

@@ -382,7 +382,7 @@ sub GetVnodeId($)
     if (IsVersion0($node)) {
 	$result = GetNodeId($node);
     } else {
-	my $vnoderef = GeniXML::FindNodesNS("vnode", $node,
+	my $vnoderef = GeniXML::FindNodesNS("n:vnode", $node,
 					    $EMULAB_NS)->pop();
 	if (defined($vnoderef)) {
 	    $result = GetText("name", $vnoderef);