DATAJDBC-267 - Favor JdbcCustomConversions over CustomConversions in return type.

Original pull request: #89.

src/main/java/org/springframework/data/jdbc/repository/config/JdbcConfiguration.java

@@ -62,7 +62,7 @@ public class JdbcConfiguration {
 	 * @return must not be {@literal null}.
 	 */
 	@Bean
-	protected CustomConversions jdbcCustomConversions() {
+	protected JdbcCustomConversions jdbcCustomConversions() {
 		return new JdbcCustomConversions();
 	}
 }