Allows for bridging webflux when using hystrix commands.

fixes gh-2355

* Allow init params to be set on ProxyStreamServlet.

Fixes gh-2301

* Added unit test for #gh-2301

fixes gh-2318

fixes gh-2298

fixes gh-1982

* Move Archaius to its own module.  

Fixes gh-2300\

fixes gh-2216

fixes gh-2317

fixes gh-2312

fixes gh-2314

fixes gh-2309i

These things are now much better dealt with in Spring MVC and WebFlux

fixes gh-1946, gh-2220, gh-2221, gh-2222

fixes gh-1946, gh-2220, gh-2221, gh-2222

Modfied RibbonCommandContext to make request entity resettable. fixes gh-892

* Remove @EnableDiscoveryClient and @EnableEurekaClient as there are now optional.  Fixes #2241.

SpringMvcContract: Ignore RequestMapping headers with no value.