Use build rather than create where possible for faster tests

spec/factories/case_log.rb

@@ -11,5 +11,7 @@ FactoryBot.define do
       tenant_code { "BZ737" }
       postcode { "NW1 7TY" }
     end
+    created_at { Time.now }
+    updated_at { Time.now }
   end
 end

spec/views/case_log_index_view_spec.rb

@@ -1,7 +1,7 @@
 require "rails_helper"
 RSpec.describe "case_logs/index" do
-  let(:in_progress_log) { FactoryBot.create(:case_log, :in_progress) }
-  let(:submitted_log) { FactoryBot.create(:case_log, :submitted) }
+  let(:in_progress_log) { FactoryBot.build(:case_log, :in_progress) }
+  let(:submitted_log) { FactoryBot.build(:case_log, :submitted) }
 
   context 'given an in progress log list' do
     it 'renders a table for in progress logs only' do