HHH-19892 fix the test

Author: gavinking

hibernate-core/src/test/java/org/hibernate/orm/test/entitygraph/LoadGraphMergeTest.java

@@ -81,8 +81,7 @@ public void testGrandChildHasNotBeenInitializedByMerge(EntityManagerFactoryScope
 
 			Session session = entityManager.unwrap( Session.class );
 
-			Parent mergedParent = session.merge( parent,
-					entityManager.getEntityGraph( "parent.child" ) );
+			Parent mergedParent = session.merge( parent, LoadGraphMergeTest_.Parent_._parent_child );
 
 			Child child = mergedParent.getChild();
 			assertTrue( Hibernate.isInitialized( child ) );
@@ -113,7 +112,7 @@ public void testChildHasNotBeenInitializedByMerge(EntityManagerFactoryScope scop
 			assertFalse( Hibernate.isInitialized( child1 ) );
 
 			Session session = entityManager.unwrap( Session.class );
-			Parent mergedParent = session.merge( parent, session.createEntityGraph( "parent" ) );
+			Parent mergedParent = session.merge( parent, LoadGraphMergeTest_.Parent_._parent );
 
 			Child child = mergedParent.getChild();
 			assertFalse( Hibernate.isInitialized( child ),