[Rpm-metadata] updates

[seth vidal]

> 
> paphio:~/XML -> more ../fedora-core-test2-metadata.xml
> xmlEncodeEntitiesReentrant : input not UTF-8
> <?xml version="1.0"?>
> <metadata xmlns="http://linux.duke.edu/md/common">
>   <package type="rpm">
>     <name>4Suite</name>
> ....
> 
> -------------
> err=""
> def callback(ctx, str):
>      global err
>                                                                                 
>      err = err + "%s %s" % (ctx, str)
>                                                                                 
> libxml2.registerErrorHandler(callback, "-->")

Actually. I just changed it so it now uses
 doc.saveTo(fileobject, 'UTF-8', 1)

relying on redirection is all this extra work :)

-sv