fixes gh-968

Route specific sensitiveHeaders override global.

fixes gh-944

* pull945:
  Ribbon retry works & fix Content-Length error.

This change requires setting `ribbon.http.client.enabled=true`.

This change addresses issue #648 Getting Retry Working In RestTemplate. There is also a fix in place that addresses the issue #357 RestTemplate Error.

fixes gh-648

fixes gh-961

* pull883:
  Send 404 in zuul servlet when no route is found.

Fixes false 200 in zuul when using zuul servlet rather than mvc servlet.

Fixes gh-865

fixes gh-957

fixes gh-956

fixes gh-955

fixes gh-954

Fixes gh-352

https://github.com/Netflix/eureka/releases/tag/v1.4.5

restores http basic auth.

Fixes gh-948

Fixes gh-642

* pull933:
  Adding the ability to specify a custom retry handler in the ribbon client configuration.

fixes gh-931

fixes gh-932

fixes gh-912

Allows feign/ribbon users to use standard config files rather than creating a bean of Request.Options.

fixes gh-696

When fallback beans are created, there was no longer a unique bean of the feign interface which caused autowire problems.

fixes gh-899

fixes gh-908

fixes gh-907

Typo in example code for `DiscoveryClient`

`DiscoveryClient` field declared with name `discoveryClient` but `serviceUrl()` method uses `client`.

* rxjava-stream:
  Spring Mvc RxJava integration.

Support for Single via a ReturnValueHandler.
Support for Observable via SseEmitter.

fixes gh-902