UNIT_TESTING_18499_CHANGE_PASSWORD

 - [x] Controller
    - [x] create validate_password_notok
    - [x] create change_password_ok
    - [x] create change_password_notok
 - [x] Model
    - [x] create validate_password_ok
    - [x] create validate_password_notok
    - [x] create change_password_ok
    - [x] create change_password_notok