Fix wrong denormalization context for related resources

Fixes #303

Author: teohhanhui

JsonLd/Serializer/ItemNormalizer.php

@@ -189,6 +189,8 @@ public function denormalize($data, $class, $format = null, array $context = [])
         $resource = $this->guessResource($data, $context, true);
         $normalizedData = $this->prepareForDenormalization($data);
 
+        $context = $this->createContext($resource, $context);
+
         $attributesMetadata = $this->getMetadata($resource, $context)->getAttributes();
 
         $allowedAttributes = [];