JavadocFormatter additions

Hey Jim,

These are the additions to allow the JF to format multiple classes at once. There are a couple things to point out:

- I was unable to find a viable method for using multiple classes without them being surrounded by double quotes. This seems like an Ant deficiency. There may be a way to work around this, but it may be complex and not worth the effort at this time.
- I found the logic in the JF that allows for specifying packages to limit. Therefore, we can limit the JF to format all classes in a specified package! With the additions in this PR, we can also specify multiple packages' classes to limit (of course, surrounded by double quotes).

https://issues.liferay.com/browse/LRDOCS-960