Increase query threshold for rolled up dates spec

spec/support/shared_examples/features/work_items/rolledup_dates_shared_examples.rb

@@ -182,6 +182,9 @@ def add_existing_child(child_work_item)
 
       context 'when removing all children' do
         it 'rolled up child dates' do
+          # https://gitlab.com/gitlab-org/gitlab/-/issues/473408
+          allow(Gitlab::QueryLimiting::Transaction).to receive(:threshold).and_return(107)
+
           add_new_child(title: 'child issue 1', start_date: '2020-11-01', due_date: '2020-12-02')
           add_new_child(title: 'child issue 2', start_date: '2020-12-01', due_date: '2021-01-02')