Issue #2875374 by l0ke: Use Libraries to locate plugin

Closes #2875374

fakeobjects.install

@@ -13,7 +13,20 @@ function fakeobjects_requirements($phase) {
 
   if ($phase == 'install' || $phase == 'runtime') {
     $plugin_detected = file_exists(DRUPAL_ROOT . '/libraries/fakeobjects/plugin.js');
+    if (\Drupal::moduleHandler()->moduleExists('libraries')) {
+      $path = libraries_get_path('fakeobjects') . '/plugin.js';
+    }
+
+    // Is the plugin found in the root libraries path.
+    $plugin_detected = file_exists($path);
 
+    // If plugin is not found, then look in the current profile libraries path.
+    if (!$plugin_detected) {
+      $profile_path = drupal_get_path('profile', \Drupal::installProfile());
+      $profile_path .= '/libraries/fakeobjects/plugin.js';
+      // Is the library found in the current profile libraries path.
+      $plugin_detected = file_exists($profile_path);
+    }
     if ($plugin_detected) {
       $requirements['fakeobjects'] = [
         'title' => t('FakeObjects'),