reinstate setup needed to test default date

spec/requests/schemes_controller_spec.rb

@@ -3036,7 +3036,9 @@ RSpec.describe SchemesController, type: :request do
       let(:add_deactivations) {}
 
       before do
+        allow(FormHandler.instance).to receive(:lettings_in_crossover_period?).and_return(true)
         Timecop.freeze(Time.utc(2023, 10, 10))
+        Singleton.__init__(FormHandler)
         sign_in user
         add_deactivations
         scheme.save!
@@ -3045,6 +3047,7 @@ RSpec.describe SchemesController, type: :request do
 
       after do
         Timecop.unfreeze
+        Singleton.__init__(FormHandler)
       end
 
       context "when there is no open deactivation period" do