This allows the SBDG project to independently control the Spring Data for Apache Geode & Pivotal GemFire transitive dependencies separately from the other Spring Data Modules in the Spring Data Release Train, which are either 1) determined by Spring Boot or 2) the springDataReleaseTrainVersion property. This allows SDG 2.3.0.BUILD-SNAPSHOT to be used while maintaining the Spring Data Release Train 2.3.0.M1 version as used by Spring Boot, for example.