Not show the change password required heading when auth method doesn't allow this

[Robert Lyon]

When there are mandatory fields set and a user doesn't not have them all set they get a screen on login where they can fill in the missing options.

If they are logging in via a non-internal auth method that doesn't allow password change, eg SAML, but the passwordchange value was set to 1 in the database they see a heading about password change.

This needs to be fixed.

[Robert Lyon (robertl-9)]

Related to the change at Bug 1818901

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10651
Committed: https://git.mahara.org/mahara/mahara/commit/6b592ead261692d8a763cd5fee0d9ac83ef0f9b5
Submitter: Cecilia Vela Gurovic (<email address hidden>)
Branch: master

commit 6b592ead261692d8a763cd5fee0d9ac83ef0f9b5
Author: Robert Lyon <email address hidden>
Date: Sun Dec 8 09:38:17 2019 +1300

Bug 1855553: Hide password change heading

When using an auth method that does not allow password changing

Change-Id: I04049e44ac47619d917e0ae7c79dcd82679ea670
Signed-off-by: Robert Lyon <email address hidden>