setFollowRedirects accoring to HttpRequest

Adds a call to setFollowRedirects on the HttpURLConnection so that this is set according to the HttpRequest.
Corresponding pull request: (this uses a method introduced in the pull request/change to Net.HttpRequest below)
https://github.com/libgdx/libgdx/pull/2054
Merge pull request #2055 from WillemWillemWillem/patch-2

setFollowRedirects accoring to HttpRequest