Allow Java devices to customize action errors

[simoncn]

Thanks for applying these changes.

Unforunately they haven't quite been applied correctly. The change to DvUpnpJava.tt has ben applied as

Code:

invocation.reportActionError(ae, "Invalid XML");

instead of

Code:

invocation.reportActionError(ae, "<#=a.name#>");

The second argument to reportActionError() should be the name of the action. It's used by reportActionError() to produce a default message "Action xxxx failed".

If you look at the equivalent code in the C# bindings, you'll see that it does the same thing.