Merge branch '6.4' into 7.0

* 6.4:
  fix DoctrineCaster tests
  add missing partition attribute to the schema definition

Author: xabbuh

Tests/Caster/DoctrineCasterTest.php

@@ -36,9 +36,9 @@ public function testCastPersistentCollection()
             $expected = <<<EODUMP
                 Doctrine\ORM\PersistentCollection {
                 %A
-                  -em: Mock_EntityManagerInterface_%s { …3}
                   -backRefFieldName: null
                   -isDirty: false
+                  -em: Mock_EntityManagerInterface_%s { …3}
                   -typeClass: Doctrine\ORM\Mapping\ClassMetadata { …}
                 %A
                 EODUMP;