Allow Scrutinizer C

I am tired of complexity warnings for non-complex code.

Author: oleibman

.scrutinizer.yml

@@ -24,7 +24,7 @@ tools:
         timeout: 600
 
 build_failure_conditions:
-    - 'elements.rating(<= C).new.exists'                        # No new classes/methods with a rating of C or worse allowed
+    - 'elements.rating(<= D).new.exists'                        # No new classes/methods with a rating of D or worse allowed
     - 'issues.severity(>= MAJOR).new.exists'                    # New issues of major or higher severity
     - 'project.metric_change("scrutinizer.test_coverage", < 0)' # Code Coverage decreased from previous inspection
     - 'patches.label("Unused Use Statements").new.exists'       # No new unused imports patches allowed