Unify default HTTP client redirect behavior and provide configuration option

[philwebb]

Switching to JdkClientHttpRequestFactory as our default has interesting implications when it comes to following redirects. By default, JdkClientHttpRequestFactory does not where as SimpleClientHttpRequestFactory does. We should consider carefully what our default should be and if we want to offer a quick way to change it.

[quaff]

#27360 is related.

[philwebb]

Thanks @quaff. I wish we could configure redirects on a per call basis, but unfortunately that looks pretty tricky.