Make all factory created Qcables have a Sanger Ean13 barcode

spec/factories/z_tag_qc_factories.rb

@@ -66,7 +66,7 @@
     # callbacks.
     lot { create(:lot) }
     qcable_creator { create(:qcable_creator) }
-    transient { sanger_barcode { nil } }
+    transient { sanger_barcode { create(:sanger_ean13) } }
 
     factory :qcable_with_asset do
       state { 'created' }

spec/requests/api/v2/qcables_spec.rb

@@ -13,7 +13,7 @@
 
   context 'with a list of resources' do
     let(:resource_count) { 5 }
-    let!(:resources) { Array.new(resource_count) { create(:qcable_with_asset, sanger_barcode: create(:sanger_ean13)) } }
+    let!(:resources) { Array.new(resource_count) { create(:qcable_with_asset) } }
 
     describe '#GET all resources' do
       before { api_get base_endpoint }
@@ -59,7 +59,7 @@
 
   context 'with a single resource' do
     describe '#GET resource by ID' do
-      let(:resource) { create(:qcable_with_asset, sanger_barcode: create(:sanger_ean13)) }
+      let(:resource) { create(:qcable_with_asset) }
 
       context 'without included relationships' do
         before { api_get "#{base_endpoint}/#{resource.id}" }
@@ -119,7 +119,7 @@
   end
 
   describe '#PATCH a resource' do
-    let(:resource) { create(:qcable_with_asset, sanger_barcode: create(:sanger_ean13)) }
+    let(:resource) { create(:qcable_with_asset) }
 
     context 'with a valid payload' do
       let(:new_labware) { create(:full_plate) }