Fix sporadic test failure in service broker deletion during creation

The test was flaky because both create and delete jobs could be enqueued
with the same timestamp, making pickup order non-deterministic. When the
delete job ran first, the create job failed with ServiceBrokerGone.

Fix by setting a higher priority number for the delete job so the create
job always runs first.

Author: philippthun

spec/request/lifecycle/service_brokers_spec.rb

@@ -151,6 +151,10 @@
           stub_request(:get, 'http://example.org/my-service-broker-url/v2/catalog').
             with(basic_auth: %w[admin password]).
             to_return(status: 200, body: catalog, headers: {})
+
+          # Both jobs may be enqueued with the same timestamp, making pickup order non-deterministic.
+          # Give the delete job a higher priority number so the create job always runs first.
+          TestConfig.config[:jobs][:priorities] = { 'service_broker.delete': 10 }
         end
 
         it 'allows deletion during creation' do