Gradient personnel view should use the new wiki

[jorgenschaefer]

emtools/grdpersonnel/views.py:get_roster currently uses the old wiki via web access. It should use the new Wiki's Roster page via local database access.

This is a bit more complex than it should be, as utils.connect() currently can't deal with different passwords per database, which needs to be added first.

Once that is done, the roster page text is a simple SQL query away:

SELECT t.old_text
FROM page p 
     INNER JOIN revision r ON p.page_latest = r.rev_id
     INNER JOIN text t ON r.rev_text_id = t.old_id
WHERE p.page_title = 'Roster'