Make phpcs and PhpStorm happy w/ intentional switch, case fall-throughs

Unfortunately, PhpStorm does not regonise PSR2 fall-through comments.
On the other hand, phpcs does not support the @noinspection phpdoc comment (/**).
The fix is a mix of PSR2 comments and @noinspection tags in code comments.

library/Icinga/Web/Response/JsonResponse.php

@@ -176,8 +176,10 @@ class JsonResponse extends Response
             'status' => $this->status
         );
         switch ($this->status) {
+            /** @noinspection PhpMissingBreakStatementInspection */
             case static::STATUS_ERROR:
                 $body['message'] = $this->getErrorMessage();
+                // Fallthrough
             case static::STATUS_FAIL:
                 $failData = $this->getFailData();
                 if ($failData !== null || $this->status === static::STATUS_FAIL) {

modules/monitoring/library/Monitoring/Plugin/Perfdata.php

@@ -290,16 +290,20 @@ class Perfdata
         }
 
         switch (count($parts)) {
+            /* @noinspection PhpMissingBreakStatementInspection */
             case 5:
                 if ($parts[4] !== '') {
                     $this->maxValue = self::convert($parts[4], $this->unit);
                 }
+            /* @noinspection PhpMissingBreakStatementInspection */
             case 4:
                 if ($parts[3] !== '') {
                     $this->minValue = self::convert($parts[3], $this->unit);
                 }
+            /* @noinspection PhpMissingBreakStatementInspection */
             case 3:
                 $this->criticalThreshold = trim($parts[2]) ? trim($parts[2]) : null;
+                // Fallthrough
             case 2:
                 $this->warningThreshold = trim($parts[1]) ? trim($parts[1]) : null;
         }