QSqlQueryModel test: don't copy a QSqlQuery

Move the query into the model, and use a local scope to make sure that
we don't use the moved-from query later.

Pick-to: 6.9
Change-Id: I9d216e770733af8b0771280276dba0775209a802
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Reviewed-by: Dheerendra Purohit <dheerendra@pthinks.com>

tests/auto/sql/models/qsqlquerymodel/tst_qsqlquerymodel.cpp

@@ -694,11 +694,13 @@ void tst_QSqlQueryModel::refreshQueryWithBoundValues()
     QSqlDatabase db = QSqlDatabase::database(dbName);
     QSqlQueryModel model;
 
-    QSqlQuery query(db);
-    query.prepare("SELECT name FROM " + qTableName("test", __FILE__, db) + " WHERE id = :id");
-    query.bindValue(":id", 1);
-    query.exec();
-    model.setQuery(query);
+    {
+        QSqlQuery query(db);
+        query.prepare("SELECT name FROM " + qTableName("test", __FILE__, db) + " WHERE id = :id");
+        query.bindValue(":id", 1);
+        query.exec();
+        model.setQuery(std::move(query));
+    }
 
     QCOMPARE(model.rowCount(), 1);
     QCOMPARE(model.data(model.index(0, 0)).toString(), QString("harry"));