CLDC-2882 Changed void date routing to only use isRenewal (#1982)

* CLDC-2882 Added 20 "Tenant moved to long-stay hospital or similar institution" as a non-renewal or first let vacancy reason, and changed the conditions for the void date to only rely on whether a letting is a renewal.

* CLDC-2882 Update void date routing test

* CLDC-2882 Fix flaky log export test

app/models/form/lettings/pages/void_date.rb

@@ -2,8 +2,7 @@ class Form::Lettings::Pages::VoidDate < ::Form::Page
   def initialize(id, hsh, subsection)
     super
     @id = "void_date"
-    @depends_on = [{ "is_renewal?" => false, "vacancy_reason_not_renewal_or_first_let?" => true },
+    @depends_on = [{ "is_renewal?" => false }]
-                   { "is_renewal?" => false, "has_first_let_vacancy_reason?" => true }]
   end
 
   def questions

app/models/lettings_log.rb

@@ -338,7 +338,7 @@ class LettingsLog < Log
   end
 
   def vacancy_reason_not_renewal_or_first_let?
-    [5, 6, 8, 9, 10, 11, 12, 13, 18, 19].include? rsnvac
+    [5, 6, 8, 9, 10, 11, 12, 13, 18, 19, 20].include? rsnvac
   end
 
   def previous_tenancy_was_temporary?

spec/models/form/lettings/pages/void_date_spec.rb

@@ -28,6 +28,6 @@ RSpec.describe Form::Lettings::Pages::VoidDate, type: :model do
   end
 
   it "has the correct depends_on" do
-    expect(page.depends_on).to eq([{ "is_renewal?" => false, "vacancy_reason_not_renewal_or_first_let?" => true }, { "has_first_let_vacancy_reason?" => true, "is_renewal?" => false }])
+    expect(page.depends_on).to eq([{ "is_renewal?" => false }])
   end
 end

spec/services/exports/lettings_log_export_service_spec.rb

@@ -33,7 +33,8 @@ RSpec.describe Exports::LettingsLogExportService do
   end
 
   before do
-    Timecop.travel(start_time)
+    Timecop.freeze(start_time)
+    Singleton.__init__(FormHandler)
     allow(storage_service).to receive(:write_file)
 
     # Stub the form handler to use the real form