Because the storage views lean on the implementation of
setup_password_validation from the identity screen, we were forced to
use a form with fields named "password" and "password_confirm".
This makes the code confusing because we use the "passphrase"
terminology in the storage forms.
We now leave up to the caller to specify which fields he wants to be
part of the validation ; instead of making him provide the full form.
Signed-off-by: Olivier Gayot <olivier.gayot@canonical.com>
d63b44c014