Refactored the GemfireDataSourcePostProcessorTest class test cases based on the new implementation of the GemfireDataSourcePostProcessor BeanFactoryPostProcessor, which uses the GemFire internal GetRegionsFunction GemFire Function as a fallback when the ListRegionsOnServerFunction has not been registered or is not available. In addition, added 2 integration tests to test a Spring Data GemFire ClientCache connecting to a Spring-configured GemFire Server and non-Spring-configured GemFire Server asserting that client PROXY Region beans are appropriately created in the Spring ApplicationContext. (cherry picked from commit 52e4be42402ee376df17d7ae036336548b1349c9) Signed-off-by: John Blum <jblum@pivotal.io>