Github user pdion891 commented on the issue:
https://github.com/apache/cloudstack/pull/1684
upgrade from 4.7.0 to 4.9.0.1 not working with same error:
```
WARN [o.a.c.s.a.PBKDF2UserAuthenticator] (qtp204585401-22:ctx-9e4c5615)
(logid:1ca9f551) The stored password for admin isn't in the right format for
this authenticator
```
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