retry POST is not working

[spencergibb]

See #580 (comment) for project to reproduce.

The problem is that the routeId is null and the event is never published to cache the body.

spring-cloud-gateway/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/factory/RetryGatewayFilterFactory.java

Lines 166 to 169 in b9df119

	if (routeId != null && getPublisher() != null) {
	// send an event to enable caching
	getPublisher().publishEvent(new EnableBodyCachingEvent(this, routeId));
	}

[spencergibb]

To work around the problem, you need to add routeId to the retry configuration. It must match the routeId.

spring:
  cloud:
    gateway:
      routes:
      - id: greeting-service
        uri: lb://greeting-service
        predicates:
        - Path=/greeting-service/**
        filters:
        - name: RewritePath
          args:
            regexp: /greeting-service/(?<path>.*)
            replacement: /$\{path}
        - name: Retry
          args:
            routeId: greeting-service
            methods: GET,POST