bug #1477 [Turbo] simplify returning entity class name (jrushlow)

This PR was merged into the 2.x branch.

Discussion
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[Turbo] simplify returning entity class name

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes/no <!-- please update src/**/CHANGELOG.md files -->
| Issues        | Fix #
| License       | MIT

credit goes to nicolas, but alternate way to return the class name

Commits
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cded391 [Turbo] simplify returning entity class name

src/Turbo/src/Doctrine/ClassUtil.php

@@ -22,12 +22,7 @@ final class ClassUtil
     public static function getEntityClass(object $entity): string
     {
         if ($entity instanceof LazyObjectInterface) {
-            $entityClass = get_parent_class($entity);
-            if (false === $entityClass) {
-                throw new \LogicException('Parent class missing');
-            }
-
-            return $entityClass;
+            return get_parent_class($entity) ?: $entity::class;
         }
 
         // @legacy for old versions of Doctrine