Use filter constants where appropriate

Fix compilation problem on eclipse java compiler

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

* add feign client properties

* configure feign builder from properties if exists

* change string config to class config and add unit test for feign client using configuration properties

* refactoring and add primary flag configuration

* add decode404 in feign client configuration properties

* change unit test properties decode404 to true

* remove lombok from FeignClientProperties and change primary attribute to default-to-properties

fixes gh-1931

* Support for re-writing Location Headers

* Added additional constructor for Route, removed auto-configuration of LocationRewriteFilter

* Polished docs, more tests

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

* Add options for RibbonCommand to use separate thread pools for hystrix

* Remove lombok annotation and Add getter/setter for ZuulProperties$HystrixThreadPool

* Add doc about how to configure hystrix thread pools in Zuul Developer Guide

* Add testcases for HystrixThreadPoolKey of RibbonCommand

* Tiny change about if block in AbstractRibbonCommand

fixes gh-2063

Rename *Test.java -> *Tests.java. Fixes #2042

Override getThreadPool from HystrixConcurrencyStrategy and delegate to

existing strategy if present. Fixes #2035

This allows clients to send batched up events in the same format as
before (or to continue to send single events). We can switch the
default format to an array in 1.4.x.

fixes a problem with whitespaces in list of retryable status codes

Merge branch 'fix_whitespaces_in_retryable_status_codes_list' of github.com:doernbrackandre/spring-cloud-netflix into fix_whitespaces_in_retryable_status_codes_list

This reverts commit f5524263.