Code review for 6915797 & 7090178

[Mandy Chung]

 6915797: Remove sun.tools.jar.JarImageSource that is not used
7090178: Move java.util.XMLUtils to another package to avoid split package

Webrev at:
    http://cr.openjdk.java.net/~mchung/6915797/webrev.00/

The synopsis says it all.

Thanks
Mandy