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

This reverts commit 46ee0ce1.

s-c-commons creates an AutoServiceRegistrationProperties bean if enabled.

This commit only auto registers with eureka if that bean is available.

Defaults were set too late and were overriding values set in the environment.

Specifically, spring.application.name took precedence over eureka.instance.appname.

 fixes gh-1516

Specifically, add `@ConditionalOnBean(EurekaClient.class)`.

Fixes an issue where eureka and ribbon are on the classpath, eureka.client.enabled=false which would cause a bean not found exception.

fixes gh-1511

(cherry picked from commit d1f8c031)

fixes gh-1345

Use the new ServiceRegistry interface

Creates a new EurekaRegistration object that aggregates classes needed
for a single registration.

This reverts commit 90d6490f.

This reverts commit 088afa6d.

Use statusPage/healthCheckUrlPath w/ custom management.port

Added RelaxedPropertyResolver to handle multiple valid formats for
eureka properties.  Added tests.

Fixes gh-1348

Was previously milliseconds/seconds when calculating whether to display the message about reporting failures.

This reverts commit 3c1a23e7.

This fixes a case where the ribbon property is set `ribbon.IsSecure=false`, but because the eureka secure port was enabled, the uri created by ribbon was prefixed with https when it shouldn't have.

All places where isSecure is need have been consolidated into RibbonUtils.

fixes gh-1270

This reverts commit 258e53a4.

A problem in Spring Boot means that the extra conditions are combined
with OR not AND, so it's a bug to have more than one until that
gets fixed (in an AnyNestedCondition).

See https://github.com/spring-projects/spring-boot/pull/6672

Fixes gh-1205

Allows ribbon class name properties to be used to define beans.

This seems like boilerplate, but works, though not easily extensible.

fixes gh-927

Eliminates a legacy use of a static singleton. This will help allow multiple registrations.