Issue #1512676 by swentel: Fixed Simpletest doesn't clean up the config...

Issue #1512676 by swentel: Fixed Simpletest doesn't clean up the config directories generated by the configuration .

core/modules/simpletest/drupal_web_test_case.php

@@ -1547,6 +1547,9 @@ protected function tearDown() {
     // Delete temporary files directory.
     file_unmanaged_delete_recursive($this->originalFileDirectory . '/simpletest/' . substr($this->databasePrefix, 10));
 
+    // Delete temporary config files directory.
+    file_unmanaged_delete_recursive($this->originalFileDirectory . '/simpletest/config_simpletest' . substr($this->databasePrefix, 10));
+
     // Remove all prefixed tables (all the tables in the schema).
     $schema = drupal_get_schema(NULL, TRUE);
     foreach ($schema as $name => $table) {

core/modules/simpletest/simpletest.module

@@ -459,7 +459,7 @@ function simpletest_clean_temporary_directories() {
     $files = scandir('public://simpletest');
     foreach ($files as $file) {
       $path = 'public://simpletest/' . $file;
-      if (is_dir($path) && is_numeric($file)) {
+      if (is_dir($path) && (is_numeric($file) || strpos($file, 'config_simpletest') !== FALSE)) {
         file_unmanaged_delete_recursive($path);
         $count++;
       }