Update CodeClimate configuration to new structure

.codeclimate.yml

@@ -1,31 +1,45 @@
-engines:
+version: '2' # required to adjust maintainability checks
-  duplication:
+
-    enabled: true
+plugins:
-    config:
-        languages:
-        - java
-        - php
   checkstyle:
     enabled: true
-    channel: beta
+    config:
-    config: '.checkstyle.xml'
+      file: '.checkstyle.xml'
-  pmd:
+
-    enabled: true
+checks:
-    channel: beta
+  # We disable all the following CodeClimate checks: Checkstyle already checks for these things and has the advantage
-    checks:
+  # that the Checkstyle config can also be used in one's IDE.
-      AvoidUsingHardCodedIP:
+  argument-count:
-        enabled: false
+    enabled: false
-ratings:
+  complex-logic:
-  paths:
+    enabled: false
-  # Check only production files
+  file-lines:
-  - 'src/main/java/**'
+    enabled: false
-exclude_paths:
+  method-complexity:
-# Exclude code from third-party sources
+    enabled: false
-- 'src/main/java/fr/xephi/authme/mail/OAuth2Provider.java'
+  method-count:
-- 'src/main/java/fr/xephi/authme/mail/OAuth2SaslClient.java'
+    enabled: false
-- 'src/main/java/fr/xephi/authme/mail/OAuth2SaslClientFactory.java'
+  method-lines:
-- 'src/main/java/fr/xephi/authme/security/crypts/BCryptService.java'
+    enabled: false
-- 'src/main/java/fr/xephi/authme/security/crypts/PhpBB.java'
+  nested-control-flow:
-- 'src/main/java/fr/xephi/authme/security/crypts/Whirlpool.java'
+    enabled: false
-- 'src/main/java/fr/xephi/authme/security/crypts/Wordpress.java'
+  return-statements:
-- 'src/test/java/**Test.java'
+    enabled: false
+  similar-code:
+    enabled: false
+  # The "identical-code" check would be cool to enable since Checkstyle offers no such functionality, but it is
+  # too aggressive and we'd have to suppress many reported warnings.
+  identical-code:
+    enabled: false
+
+exclude_patterns:
+  # Exclude code from third-party sources
+  - 'src/main/java/fr/xephi/authme/mail/OAuth2Provider.java'
+  - 'src/main/java/fr/xephi/authme/mail/OAuth2SaslClient.java'
+  - 'src/main/java/fr/xephi/authme/mail/OAuth2SaslClientFactory.java'
+  - 'src/main/java/fr/xephi/authme/security/crypts/BCryptService.java'
+  - 'src/main/java/fr/xephi/authme/security/crypts/PhpBB.java'
+  - 'src/main/java/fr/xephi/authme/security/crypts/Whirlpool.java'
+  - 'src/main/java/fr/xephi/authme/security/crypts/Wordpress.java'
+  # Don't check test classes
+  - 'src/test/java/**/*Test.java'