Change spring-cloud-starter-hystrix-dashboard to spring-cloud-starter-netflix-hystrix-dashboard (#2561)

Change spring-cloud-starter-hystrix-dashboard to spring-cloud-starter-netflix-hystrix-dashboard

* InputStream should always be closed after reading contents from upstreams

* Fixes double encoding when creating secure URLs.  Fixes #2478.

Closes #2475

fix zuul filters package url in Edgware

Use StringBuffer for String concatenation

Format indent adjustment

* Add support loadBalancerKey in RibbonRoutingFilter

* Add documentation about how to provide a loadBalancerKey to Ribbon

* Add integrationtest for RibbonRoutingFilter's loadBalancerKey support

* Adds backoff policies when retrying requests.  Fixes #2195

* fixing final variable

Incorrect statusPageUrl and healthCheckUrl are reported to Eureka if management.context-path is not set (#2145)

Follows: https://github.com/spring-cloud/spring-cloud-netflix/pull/1317

Probably we could import a bom from feign.

In order to fix issue with TPS in hystrix-dashboard threadpool section, removing average calculation for propertyValue_metricsRollingStatisticalWindowInMilliseconds. This was done for hystrixCommand.js previously but not for hystrixThreadpool.js.

- The eureka instance auto registration also changes the secure port when the server port is random (0)

Fixes gh-2303

Update documentation to reflect https://github.com/spring-cloud/spring-cloud-netflix/issues/1048

* Add new Zuul filters endpoint and refactor routes endpoint
* Refactor FiltersEndpoint
- Extend from AbstractEndpoint and simplify code
- Move tests classes into package endpoint
- Remove usage of Lombok
* Conditionally enable Zuul routes and filters endpoints
* Provide FilterRegistry to FiltersEndpoint via constructor

Extract separate class TurbineClustersProvider to be able to provide custom solution for retrieving configured clusters (#2219)

See https://github.com/spring-cloud/spring-cloud-commons/issues/265