kafka: TopicCreator.CreateTopics performs unnecessary topic updates

[axw]

apm-queue/kafka/topiccreator.go

Lines 210 to 217 in 2261b83

	if len(existingTopics) > 0 && len(c.topicConfigs) > 0 {
	alterCfg := make([]kadm.AlterConfig, 0, len(c.topicConfigs))
	for k, v := range c.topicConfigs {
	alterCfg = append(alterCfg, kadm.AlterConfig{Name: k, Value: v})
	}
	alterResp, err := c.m.adminClient.AlterTopicConfigs(ctx,
	alterCfg, existingTopics...,
	)

As soon as a topic has been created, this code will always trigger an AlterTopicConfigs if there are any topic configs defined. This creates unnecessary API calls to Kafka, and creates log spam.