Improve GemFire Java-based configuration support - Iteration 1

This 'improvement' will add annotations and base classes to support the configuration and setup of either a client or peer GemFire cache using Spring's Java-based Annotation configuration meta-data. This 'improvement' is inspired by Spring Data Cassandra's annotation configuration support (and here) along with @Enable annotations in Spring Session, such as the @EnableGemFireHttpSession.