set proper status and health eureka urls if prefer ip address is set

* Adding protected getter to obtain CompositeHealthIndicator. This allows subclasses to obtain this indicator's health details map which is useful for error reporting.

fixes gh-2456

Incorrect statusPageUrl and healthCheckUrl are reported to Eureka if management.context-path is not set (#2145)

Follows: https://github.com/spring-cloud/spring-cloud-netflix/pull/1317

- The eureka instance auto registration also changes the secure port when the server port is random (0)

Fixes gh-2303

fixes gh-2386

See https://github.com/spring-cloud/spring-cloud-commons/issues/265

Port information was missing from data sent to eureka.

fixes gh-2372

fixes gh-2216

* Remove @EnableDiscoveryClient and @EnableEurekaClient as there are now optional.  Fixes #2241.

This moves the lifecycle of the eureka client of of EurekaServiceRegistry.

fixes gh-2099

Fixes gh-1849

Needed in `EurekaClientConfigBean` because `CloudEurekaTransportConfig` is a separate class.

Fixes gh-2138

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

fixes gh-1795

Fixes a race condition introduced in 1.3.0

fixes gh-1933

Ribbon client configuration based on Eureka is disabled if eureka.client.enabed is set to false.

Fixes gh-335

Make EurekaDiscoveryClient.EurekaServiceInstance constructor public

fixes gh-1792

prefer-ip-address does not work in statusPageUrlPath when management port != server port

This change gets `prefer-ip-address` via a relaxed property resolver to set the value during the creation of the `EurekaInstanceConfigBean`.

fixes gh-1724