Bumps to Feign 8.8.1

Change from @Autowired to context.getBean

Solves problems where FeignClientFactoryBean is run before auto-configuration.

fixed gh-441

Replaced incorrect @PathParameter with @PathVariable

* 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.