Rename *DataProperties classes to Data*Properties

[wilkinsona]

We have some inconsistency in the names of our Spring Data-related classes. For example, we have:

• CouchbaseDataProperties (spring.data.couchbase)
• DataJdbcTest
• DataNeo4jTest
• DataCouchbaseTest
• JdbcDataProperties (spring.data.jdbc)
• Neo4jDataProperties (spring.data.neo4j)

For consistency both with other classes that are Data… and with the property prefixes, we should rename the properties classes to be Data…Properties rather than …DataProperties.