Added package-info.java files for repository packages.

spring-data-mongodb/src/main/java/org/springframework/data/document/mongodb/repository/config/package-info.java

@@ -0,0 +1,4 @@
+/**
+ * Namespace configuration for Mongo DB specific repositories.
+ */
+package org.springframework.data.document.mongodb.repository.config;

spring-data-mongodb/src/main/java/org/springframework/data/document/mongodb/repository/package-info.java

@@ -0,0 +1,4 @@
+/**
+ * Mongo DB specific repository implementation.
+ */
+package org.springframework.data.document.mongodb.repository;