Merge pull request #942 from nagirrab/fix/context_for_filter

Allow context to be passed through to filter calls

Author: lgebhardt

lib/jsonapi/processor.rb

@@ -196,7 +196,7 @@ def show_related_resources
           (paginator && paginator.class.requires_record_count) ||
           (JSONAPI.configuration.top_level_meta_include_page_count))
         related_resource_records = source_resource.public_send("records_for_" + relationship_type)
-        records = resource_klass.filter_records(filters, {},
+        records = resource_klass.filter_records(filters, { context: context },
                                                 related_resource_records)
 
         record_count = resource_klass.count_records(records)