[FEATURE] Can support both underline naming and camel case naming when use annotation @FieldNameConstants?

[joshua-liu-github]

Such as source:
@FieldNameConstants(supportCamelCase=true , supportUnderline=true)
public class MetricsCommonFieldsDTO {

private String managed;

private String onlineStatus;

private String name;

}

lombok Generate:

public class MetricsCommonFieldsDTO {

private String managed;

private String onlineStatus;

private String name;

public static final class Fields {
    public static final String managed= "managed";
    public static final String onlineStatus = "onlineStatus";
    public static final String online_status = "online_status";
    public static final String name = "name";
    private Fields() {
    }
}

}

I hope lombok will support generate underline constants in the future, because most fields in the database are named with underline，thanks for you, you know.