DATAMONGO-1547 - Register MongoRepositoryFactory in spring.factories.

This is required for the switch in support for multi-store detection.

Related ticket: DATACMNS-952.

spring-data-mongodb/src/main/resources/META-INF/spring.factories

@@ -1 +1,2 @@
 org.springframework.data.web.config.SpringDataJacksonModules=org.springframework.data.mongodb.core.GeoJsonConfiguration
+org.springframework.data.repository.core.support.RepositoryFactorySupport=org.springframework.data.mongodb.repository.support.MongoRepositoryFactory