Fix inverted logic.

We want to update passwords for accounts that have not been deleted.

Logic was to update passwords only for accounts that have been deleted.

Error introduced in 6251a4ed02bbed222d0734f47ea5b89ccb329bd9.

Change-Id: I662216d5bab90d982663742762f9c722398168c0
Clean placard junk.

Remove obsolute placard stuff that is no longer used.

Note that the placard tests will no longer work, this is expected.

Ideally, we shouldn't have placard in INSTALLED_APPS anymore, however
this is still required for the placard db model.

Change-Id: I260e3ffb22e7f104e770434be9d5408ed8a7ea46