Support bootstrapping a Geode server after Geode removes SDG dependency - GEODE-1025

As part of GEODE-1025, geode will remove the direct compile dependency on spring data gemfire in favor of providing a using a service loader to load providers that override the behavior of the server launcher.

This moves the responsibility of bootstrapping the server with a spring configuration file to spring data gemfire. Spring data gemfire needs to provide an implementation of the service that will bootstrap the server with spring once GEODE-1025 is complete.