fabric8 and k8s differ in their discovery reactive health implementations

[wind57]

In the k8s discovery we do :

	@Bean
	@ConditionalOnClass(name = "org.springframework.boot.actuate.health.ReactiveHealthIndicator")
	@ConditionalOnDiscoveryHealthIndicatorEnabled
	public ReactiveDiscoveryClientHealthIndicator kubernetesReactiveDiscoveryClientHealthIndicator(
			KubernetesInformerReactiveDiscoveryClient client, DiscoveryClientHealthIndicatorProperties properties,
			KubernetesClientPodUtils podUtils) {
		ReactiveDiscoveryClientHealthIndicator healthIndicator = new ReactiveDiscoveryClientHealthIndicator(client,
				properties);
		InstanceRegisteredEvent<?> event = new InstanceRegisteredEvent<>(podUtils.currentPod(), null);
		healthIndicator.onApplicationEvent(event);
		return healthIndicator;
	}

that is: we publish InstanceRegisteredEvent. In the fabric8 one:

	@Bean
	@ConditionalOnClass(name = "org.springframework.boot.actuate.health.ReactiveHealthIndicator")
	@ConditionalOnDiscoveryHealthIndicatorEnabled
	public ReactiveDiscoveryClientHealthIndicator kubernetesReactiveDiscoveryClientHealthIndicator(
			KubernetesReactiveDiscoveryClient client, DiscoveryClientHealthIndicatorProperties properties) {
		return new ReactiveDiscoveryClientHealthIndicator(client, properties);
	}

that is: we do not publish the InstanceRegisteredEvent.

imo, we should fix fabric8 one.