Can't create a UsernameToken without a password

"WSHandler: application provided null or empty password" message when trying to send a UsernameToken with passwordType == PasswordNone.

Seems to be happening because WSHandler doesn't rcognize this as possible, even though password is optional.

This is a regression of sorts, as this same problem was fixed in previous versions. The UsernameToken.setPassword method has a check to allow this, but the getPasswordCB method is checking before this and claiming it's an error.