Update checkstyle config and CodeClimate exclusions

- Add new checkstyle checks: require Javadoc on large private methods, default in switch, declaration order & others
- Update path exclusions in CodeClimate config to match newly renamed classes (e.g. PHPBB -> PhpBB)
  - Create consistency check testing that excluded paths exist as classes
- Fix some trivial violations

src/main/java/fr/xephi/authme/process/login/AsynchronousLogin.java

@@ -96,6 +96,7 @@ public class AsynchronousLogin implements AsynchronousProcess {
      * Checks the precondition for authentication (like user known) and returns
      * the player's {@link PlayerAuth} object.
      *
+     * @param player the player to check
      * @return the PlayerAuth object, or {@code null} if the player doesn't exist or may not log in
      *         (e.g. because he is already logged in)
      */