Fixing rubocops

Author: praj1001

spec/acceptance/apt_keyring_spec.rb

@@ -12,7 +12,7 @@
 
     it 'applies idempotently' do
       retry_on_error_matching do
-        idempotent_apply(pp)
+        idempotent_apply(keyring_pp)
       end
     end
   end