Issue #3084914 by drugan, mglaman, msantos202, manu manu: Support non-entity bundle types

Closes #3084914

src/Routing/Routes.php

@@ -74,14 +74,10 @@ class Routes implements ContainerInjectionInterface {
       // Add a route for all entity types.
       $route_collection->add($this->createRouteName($entity_type_id), $this->createRoute($entity_type_id));
 
-      // If this entity type has a bundle entity type,
-      // then add a route for each bundle.
-      if ($entity_type->getBundleEntityType()) {
-        // Loop through all the bundles for the entity type.
-        $bundles_info = $this->entityTypeBundleInfo->getBundleInfo($entity_type_id);
-        foreach (array_keys($bundles_info) as $bundle) {
-          $route_collection->add($this->createRouteName($entity_type_id, $bundle), $this->createRoute($entity_type_id, $bundle));
-        }
+      // Loop through all the bundles for the entity type.
+      $bundles_info = $this->entityTypeBundleInfo->getBundleInfo($entity_type_id);
+      foreach (array_keys($bundles_info) as $bundle) {
+        $route_collection->add($this->createRouteName($entity_type_id, $bundle), $this->createRoute($entity_type_id, $bundle));
       }
     }
     return $route_collection;