Polishes tests.

See https://github.com/spring-cloud/spring-cloud-commons/issues/310

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

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

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

Port information was missing from data sent to eureka.

fixes gh-2372

* 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

fixes gh-1795

Fixes a race condition introduced in 1.3.0

fixes gh-1933