QPID-8480: [Broker-J][WMC] Fix query store updater

(cherry picked from commit 16bc623e22b5154d01054150dea44c48a5744960)
diff --git a/broker-plugins/management-http/src/main/java/resources/js/qpid/management/query/StoreUpdater.js b/broker-plugins/management-http/src/main/java/resources/js/qpid/management/query/StoreUpdater.js
index 33a09af..0e2cb4b 100644
--- a/broker-plugins/management-http/src/main/java/resources/js/qpid/management/query/StoreUpdater.js
+++ b/broker-plugins/management-http/src/main/java/resources/js/qpid/management/query/StoreUpdater.js
@@ -69,6 +69,7 @@
                     {
                         this._inProgressfetch = this.inherited(arguments);
                     }
+                    var queryResults = this._inProgressfetch;
                     this._captureResults(queryResults, "fetch");
                     return queryResults;
                 },