Overlong entity name in an attribute is not a parse error.

Author: nolanw

tokenizer/entities.test

@@ -2,7 +2,7 @@
 
 {"description": "Undefined named entity in attribute value ending in semicolon and whose name starts with a known entity name.",
 "input":"<h a='&noti;'>",
-"output": ["ParseError", ["StartTag", "h", {"a": "&noti;"}]]},
+"output": [["StartTag", "h", {"a": "&noti;"}]]},
 
 {"description": "Entity name followed by the equals sign in an attribute value.",
 "input":"<h a='&lang='>",