Allow @param tags on class level

• Type: Story
• Status: Ready for QA
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: 7.0.X, Master
• Component/s: Documentation
• Labels: None
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Priority Level: Low
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/53741

Allow @param tags for Generic Type Parameters

Example:

/**
* @author Joe Bloggs
 * @param T the model class of the API
 * @param U the identifier class
*/
public class CollectionResource<T, U extends Identifier>