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/command/CommandInitializer.java

@@ -66,6 +66,10 @@ public class CommandInitializer {
         return commands;
     }
 
+    /**
+     * Builds the command description objects for all available AuthMe commands.
+     */
+    @SuppressWarnings({"checkstyle:LocalVariableName", "checkstyle:AbbreviationAsWordInName"})
     private void buildCommands() {
         // Register the base AuthMe Reloaded command
         final CommandDescription AUTHME_BASE = CommandDescription.builder()