BUGFIX: Get the current document in the query result

With the change ElasticSearchQueryBuilder::query search only one lever
under the current document. This behaviour is wrong. By example when
you search from the site node, you search all the site, but not the
homepage.

Author: dfeyer

Classes/Flowpack/ElasticSearch/ContentRepositoryAdaptor/Eel/ElasticSearchQueryBuilder.php

@@ -777,7 +777,16 @@ public function query(NodeInterface $contextNode)
         // on indexing, the __parentPath is tokenized to contain ALL parent path parts,
         // e.g. /foo, /foo/bar/, /foo/bar/baz; to speed up matching.. That's why we use a simple "term" filter here.
         // http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-term-filter.html
-        $this->queryFilter('term', ['__parentPath' => $contextNode->getPath()]);
+        $this->queryFilter('bool', [
+            'should' => [
+                [
+                    'term' => ['__parentPath' => $contextNode->getPath()]
+                ],
+                [
+                    'term' => ['__path' => $contextNode->getPath()]
+                ]
+            ]
+        ]);
 
         //
         // http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-terms-filter.html