MC-5421: Create test to check dependencies between modules in Declarative Schema

Author: fascinosum

dev/tests/static/testsuite/Magento/Test/Integrity/DependencyTest.php

@@ -392,7 +392,7 @@ protected function getDependenciesFromFiles($module, $fileType, $file, $contents
      */
     protected function _collectDependencies($currentModuleName, $dependencies = [])
     {
-        if (!count($dependencies)) {
+        if (empty($dependencies)) {
             return [];
         }
         $undeclared = [];