Polish "Adapt to relocated packages in Spring Data Cassandra"

Closes gh-9291

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/domain/EntityScan.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,8 +40,9 @@ import org.springframework.core.annotation.AliasFor;
  * {@link org.springframework.data.mapping.context.AbstractMappingContext#setInitialEntitySet(java.util.Set)
  * initial entity set} used with Spring Data
  * {@link org.springframework.data.mongodb.core.mapping.MongoMappingContext MongoDB},
- * {@link org.springframework.data.cassandra.mapping.CassandraMappingContext Cassandra}
- * and {@link org.springframework.data.couchbase.core.mapping.CouchbaseMappingContext
+ * {@link org.springframework.data.cassandra.core.mapping.CassandraMappingContext
+ * Cassandra} and
+ * {@link org.springframework.data.couchbase.core.mapping.CouchbaseMappingContext
  * Couchbase} mapping contexts.</li>
  * </ul>
  * <p>