password_policy.js unused

The purpose of password_policy.js in 6.x-1.x is to override Drupal.behaviors.password and insert translations from the Password Policy module. (There is only a single line difference between Drupal.behaviors.password in password_policy.js and module/user/user.js).

This seems to be done only to change the password meter to speak in terms of "Password quality" instead of "Password strength". This is sensible because a password that meets constraints is not necessarily "strong".

7.x-1.x did not seem to port this feature. password_policy.js is there but is unused, and is basically the D6 code.

This patch accomplishes the same as password_policy.js does in 6.x-1.x, but by overriding Drupal.settings.password instead of overriding Drupal.behaviors.password. This seems like a simpler implementation, but I am a JavaScript amateur so this is probably not following best practices.

Change "PasswordPolicy" to lower camel "passwordPolicy" per coding standards.

Accidentally submitted empty patch in #2.