[misc] Added new checkstyle rules introduced in recent versions of the Checkstyle tool

Sergiu, you added the ``eclipse.importorder`` on Jul 19, 2014 so you cannot use it as an argument. The question was why does ``eclipse.importorder`` put static imports at the end? As for example, I recently worked on [this test](https://github.com/xwiki-contrib/application-filemanager/blob/master/api/src/test/java/org/xwiki/filemanager/internal/DefaultFileTest.java) and I did organized my imports (Ctrl + Shift + O). I obviously didn't use ``eclipse.importorder`` because it's new and I wasn't aware of it but I can see that others did the same in the past [here](https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-oldcore/src/test/java/com/xpn/xwiki/XWikiMockitoTest.java).

I'm not against putting static imports at the bottom, but I want to understand why keeping them at the top is wrong (as it used to be in Eclipse at least without the ``eclipse.importorder`` you added).

> ``<property name="option" value="bottom"/>`` does that.

I can understand that this puts "something" at the bottom but I don't see why "something" is necessarily "static imports". But anyway, this is just the syntax of Eclipse import order files, cryptic for me.