fixes gh-1073

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

If DiscoveryClient.getLocalServiceInstance() throws an exception (ie consul isn't available), log a warning and continue. This is useful for dev type environments.

fixes gh-1603

Eureka ServerConfiguration is now auto-configuration based, instead of being explicitly specified via configuration pulled in through @EnableEurekaServer. This way specific beans can be conditionally overridden, configuration can be re-ordered.
Supports PeerEurekaNodes bean to be overridden by the user

Fixes gh-1717

Refactor ZoneUtils class

fixes gh-1731

Remove duplicate null check

Fixed typo

Make the use of Spring Retry optional when using Feign

* Fix encoding issue in SpringEncoder for binary data

Fixes gh-1698

* Fix encoding issue in SpringEncoder for binary data

Fixes gh-1698

* Fix encoding issue in SpringEncoder for binary data

Add unit test.

Fixes gh-1698

* Refactors tests for better readability. Polishes imports. Removes hostname and port from TestRestTemplate-calls. Introduces @LocalServerPort

Adds the ability to turn off Spring Cloud Netflix making the feign instances as primary.

fixes gh-1016

Adds a check for an empty URI in updateToHttpsIfNeeded

Add the ability to provide a default ZuulFallbackProvider

Fixes gh-1414

#1203 Improve filter performance by using only one instance of AllEncompassingFormHttpMessageConverter (#1681)

Currently all errors during writing to the outputStream are ignored. So the
response is read to the end. This is a problem when the response is
infite or very long running (`hystrix.stream` for example) and results in the
socket never being closed and eating up threads (on zuul and the proxied
backend). With this commit the errors during writing are not ignored resulting
in closing the response.

fix gh-1672, support @RequestParam without a value