Merge pull request #19797 from owncloud/specify-php-5-4

Specify PHP 5.4 as version for scrutinizer

.scrutinizer.yml

+application:
+    environment:
+        php:
+            version: 5.4
+  
+build:
+    environment:
+        php:
+            version: 5.4
+
 filter:
     excluded_paths:
         - '3rdparty/*'