Fix tests: add required reference/district_nces_id for UK/US schools

Author: Mohamed-RPF

spec/concepts/school/create_spec.rb

@@ -10,6 +10,7 @@
       address_line_1: 'Address Line 1',
       municipality: 'Greater London',
       country_code: 'GB',
+      reference: '100000',
       creator_agree_authority: true,
       creator_agree_terms_and_conditions: true,
       creator_agree_to_ux_contact: true,

spec/features/admin/schools_spec.rb

@@ -79,7 +79,7 @@
 
     describe 'when the school is in the United States and has a postal code' do
       before do
-        school.update(country_code: 'US', postal_code: '90210')
+        school.update(country_code: 'US', postal_code: '90210', district_nces_id: '010000000001', reference: nil)
         get admin_school_path(school)
       end
 

spec/features/school/creating_a_school_spec.rb

@@ -19,6 +19,7 @@
         address_line_1: 'Address Line 1',
         municipality: 'Greater London',
         country_code: 'GB',
+        reference: '100000',
         creator_agree_authority: true,
         creator_agree_terms_and_conditions: true,
         creator_agree_to_ux_contact: true,