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

> the current code style (at least for Eclipse) keeps the static imports at the top

Really? Show me. I [see](https://github.com/xwiki/xwiki-commons/blob/master/xwiki-commons-tools/xwiki-commons-tool-verification-resources/src/main/resources/eclipse.importorder#L4) that static imports come last, as we can [see](https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-chart/xwiki-platform-chart-macro/src/main/java/org/xwiki/rendering/internal/macro/chart/source/table/DocumentTableBlockDataSource.java#L49) [in](https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-activeinstalls/xwiki-platform-activeinstalls-test/xwiki-platform-activeinstalls-test-tests/src/test/it/org/xwiki/activeinstalls/test/ui/ElasticSearchRunner.java#L27) [existing](https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/Right.java#L35) [code](https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-api/src/main/java/org/xwiki/security/authorization/internal/DefaultAuthorizationSettler.java#L36).

> I don't see how these properties affect static imports

`<property name="option" value="bottom"/>` [does that](http://checkstyle.sourceforge.net/property_types.html#importOrder).