Add support for HTTPS and Follow Redirects when using @EnableClusterConfiguration

This JIRA is meant to align Spring Data for Pivotal GemFire with Pivotal's over arching goal of securing all network communications, e.g. using HTTPS rather than plain text HTTP.

In addition, in cases where the user may have opted for unsecure, plain text HTTP connections, then it still may be necessary to support HTTP redirects, since a corporate network (e.g. Router) may respond to a non-secure HTTP request with a 3xx Status Code instructing the HTTP client to redirect to a secure HTTP endpoint.