DATAMONGO-1647 - Polishing.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoTemplate.java

@@ -20,8 +20,19 @@ import static org.springframework.data.mongodb.core.query.SerializationUtils.*;
 import static org.springframework.data.util.Optionals.*;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
 import java.util.Map.Entry;
+import java.util.Optional;
+import java.util.Scanner;
+import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 import org.bson.Document;