Add RedirectPolicy into azure-core

[alzimmermsft]

Create a new HttpPipelinePolicy in azure-core which is capable of handling redirect responses and forwarding the request to the new location. Given that this will be a generic policy, RedirectPolicy should have the following configurations available:

• Redirect location extraction function (Function<HttpResponse, String>)
• Redirect update consumer (Consumer<String>)
• Predicate which determines if a redirect is needed and allowed (Predicate<HttpResponse>)

Additionally, the HttpClient implementations provided by the SDKs, azure-core-http-netty and azure-core-http-okhttp, should be investigated into what they do internally when a redirect response is returned to them. Their redirect handling should be documented and determined whether it should be implicit handled once the policy is created.