Get a better pending message if there's no FOLIO record

`skip` short-circuits the test execution, and there's no sense trying to run `nil` through the indexer and wait for it to blow up.

spec/integration/compare_sirsi_and_folio_spec.rb

@@ -50,7 +50,7 @@
       File.read(path).scan(/to_field ["']([^"']+)["']/).map(&:first).uniq
     end
     before(:each) do
-      pending 'No record in FOLIO' unless folio_record.present?
+      skip 'No record in FOLIO' unless folio_record.present?
       pending 'No source record' if folio_record.record['source_record'].none?
     end