Oracle 11.2.0.4 and obfuscated (identified by values) passwords

In versions of Oracle older than 11.2.0.4, I have always migrated DB links with dbms_metadata.get_ddl to get the ddl for a db link as I do not have the passwords for the user at the remote site. This provides the ddl as shown below with an obfuscated password:

CREATE DATABASE LINK "db_link_name" 
CONNECT TO "remote_user" 
IDENTIFIED BY VALUES '06AD92A1C4E671B083FE5A long sting here' 
USING '(DESCRIPTION=
(ADDRESS=                                                            
(PROTOCOL=TCP)(HOST=remote.server.com)(PORT=remote port))
    (CONNECT_DATA=                      
      (SERVER=dedicated)
      (SERVICE_NAME=remote service name)
    )                                       
)'                                                                              
;                                                                                

Oracle 11.2.0.4 has a security enhancements to prevent the use of obfuscated passwords (See Doc ID 1905221.1). So you have 2 options:
a. Know the password and provide it explicitly
b. Use expdp/impdp to copy it over

Very often, option a. is not available as we do not know that password of the user at the remote site.

So I tried option b which works and creates the ddl as:

CREATE DATABASE LINK "db_link_name" 
CONNECT TO "remote_user" 
IDENTIFIED BY VALUES ':1'
USING '(DESCRIPTION=
(ADDRESS=                                                            
(PROTOCOL=TCP)(HOST=remote.server.com)(PORT=remote port))
    (CONNECT_DATA=                      
      (SERVER=dedicated)
      (SERVICE_NAME=remote service name)
    )                                       
)'                                                                              
;                                                                                

This can be directly imported via impdp.