move ddlnode cration into factory function.
move ddlnode cration into factory function.

kimkulling/openddl-parser,kimkulling/openddl-parser,FredrikHson/openddl-parser,kimkulling/openddl-parser,FredrikHson/openddl-parser,FredrikHson/openddl-parser,FredrikHson/openddl-parser,kimkulling/openddl-parser