Upgrade 11.2.0.1 to 11.2.0.2

Symptoms

SELECT TO_NUMBER('MUST_BE_SAME_TIMEZONE_FILE_VERSION')
                 *
ERROR at line 1:
ORA-01722: invalid number

========

SQL> SELECT PROPERTY_NAME, SUBSTR(property_value, 1, 30) value
  2  FROM DATABASE_PROPERTIES
  3  WHERE PROPERTY_NAME LIKE 'DST_%'
  4  ORDER BY PROPERTY_NAME;

PROPERTY_NAME                  VALUE
------------------------------ ------------------------------
DST_PRIMARY_TT_VERSION         17
DST_SECONDARY_TT_VERSION       0
DST_UPGRADE_STATE              NONE

========

SQL> SELECT version FROM v$timezone_file;

   VERSION
----------
        17