XTOOLS-7: Improve License text

* Removed JUnit which we're not redistributing
* Fixed ASL license URL
* Removed javadoc format

git-svn-id: https://svn.xwiki.org/svnroot/xwiki/xwiki-platform/xwiki-tools/trunk@4538 f329d543-caf0-0310-9063-dda96c69346f