Long property names result in invalid DDL

[Lugribossk]

E.g.:

@Entity
public class Example {
    private String shortName;
    private String loooooooooooooooooooooongName;
}

Which generates

create table example (
  short_name                    varchar(255),
  loooooooooooooooooooooong_namevarchar(255)
);

This was working in 4.6.3 before I upgraded to 6.5.1.