BUG#54832 - Comment for MyISAM says it is a default engine

Adjusted tests.

mysql-test/r/information_schema.result:
  Adjusted tests.
mysql-test/suite/funcs_1/r/is_engines_myisam.result:
  Adjusted tests.

mysql-test/r/information_schema.result

@@ -1427,7 +1427,7 @@ USE test;
 End of 5.0 tests.
 select * from information_schema.engines WHERE ENGINE="MyISAM";
 ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
-MyISAM	DEFAULT	Default engine as of MySQL 3.23 with great performance	NO	NO	NO
+MyISAM	DEFAULT	MyISAM storage engine	NO	NO	NO
 grant select on *.* to user3148@localhost;
 select user,db from information_schema.processlist;
 user	db

mysql-test/suite/funcs_1/r/is_engines_myisam.result

@@ -2,7 +2,7 @@ SELECT * FROM information_schema.engines
 WHERE ENGINE = 'MyISAM';
 ENGINE	MyISAM
 SUPPORT	DEFAULT
-COMMENT	Default engine as of MySQL 3.23 with great performance
+COMMENT	MyISAM storage engine
 TRANSACTIONS	NO
 XA	NO
 SAVEPOINTS	NO