This fixes a case where the ribbon property is set `ribbon.IsSecure=false`, but because the eureka secure port was enabled, the uri created by ribbon was prefixed with https when it shouldn't have.

All places where isSecure is need have been consolidated into RibbonUtils.

fixes gh-1270

Previously with a `@FeignClient(name="http://bad_hostname")` would pass the start time test and fail later in runtime. The test now fails fast.

fixes gh-1257

A problem in Spring Boot means that the extra conditions are combined
with OR not AND, so it's a bug to have more than one until that
gets fixed (in an AnyNestedCondition).

See https://github.com/spring-projects/spring-boot/pull/6672

What we're missing ATM is different documentation versions for different application versions. What this change does is that it's:

- finding out what is the current branch (e.g. 1.0.x)
- finding out out what is the name of the main adoc file (e.g. spring-cloud-sleuth)
- pulling the changes from gh-pages after checkout
- finding out what is the list of comma separated whitelisted branches (via the `docs.whitelisted.branches` prop)
- in gh-pages creating a folder with name of the branch  (e.g. /1.0.x)
copying all the docs/target/generated-docs/ to that folder
- if the branch from which we're calling the script is NOT master then we're changing the ${main.adoc}.html to index.html so that it's easier to access the docs (e.g. http://cloud.spring.io/spring-cloud-sleuth/1.0.x/)

Content-length not properly set when using the FormBodyWrapperFilter

Fix an issue where the FormBodyWrapperFilter would encode the form parameters differently than on the original request.

The FormBodyWrapperFilter handles the application/x-www-form-urlencoded. In the case of requests received by curl or javascript, the FormHttpMessageConverter will reencode the parameters differently (for example, '(' will be encoded while it's not with the javascript encodeURIComponent method).

While this doesn't create any problem, the content length was not properly set in HttpClientRibbonCommand. This causes the form params being stripped or the backend server would wait a long time for additional bytes depending on if the content length header was bigger/smaller than the actual data.

This reverts commit 766f8bba.

We need to still assert that the FeignClient is valid (no name and
value specified together for instance). Added missing tests.

There is a utility method in Spring that we can use to merge all
the aliases. That way 4.2 and 4.3 behave the same way.

Fixes gh-1192

Disable cookie management for RibbonLoadBalancingHttpClient Fixes gh-301

Upgrade Eureka to 1.4.10

fixes gh-1175

This reverts commit 931f0580.

Upgrade Eureka to 1.4.9

Adds property zuul.sslHostnameValidationEnabled to be able to disable the hostname validation in the simpleHostRoutingFilter

fixes gh-1057

Previously ProxyRequestHelper contained a TraceRepository field. This caused zuul apps to fail with a class not found exception if they excluded actuator. This splits TraceRepository functionality into a new TraceProxyRequestHelper that extends ProxyRequestHelper. Auto configuration creates the appropriate ProxyRequestHelper based on the existence or not of actuator classes.

fixes gh-1135