* eureka-healthcheck:
  Eureka health check

Conflicts:
	.travis.yml

Fixes gh-306

Replace XD logo with a Eureka logo

* Fixes gh-310

lays the groundworkd to implement an httpclient ribbon command

fixes gh-412

Updates to Ribbon 2.10

Synchronizes on the version in use by Feign.

Closes #4920

Consolidates references to parent pom

Some projects were failing on `./mvnw install` due to a non-existent
local path. This makes all poms use the same approach.

* gh-337:
  Detect https from Ribbon Client Config

RibbonLoadBalancer and RibbonLoadBalancer use IClientConfig IsSecure
property for service ID to determine if the service is secure. Replaces
scheme of URI of request with https if the request is secure.

fixes gh-337

* pull485:
  Make `isSecure()` match `getPort()` in secure vs non-secure resolution

fixes gh-468

fixes gh-479

* early-eureka-client:
  make EurekaClient available before smart lifecycle phase 0

Corrected docs for the 'context-path' property reference.

Implements forwarding of eureka CacheRefreshedEvent as HeartbeatEvent,
rather thank serialization hack.  Uses new Eureka DI functionality
(mostly there, some issues). Updates EurekaJacksonCodec to be
"DataCenterAware". Reference EurekaClient interface rather than
DiscoveryClient class.

fixes gh-349