Difficulty starting Hue when auth_user isn't found

Hue shouldn't start when auth_user isn't found. It's confusing that when auth_user cannot be found the login page never displays; you hae to go to the log to find out what went wrong.

Also check whether sqlite works with alternate db filenames. Context: we ran into an issue where syncdb didn't work when we had a name=hue.db . It would create the tables fine, but then it wouldn't find auth_user. When we reset the settings to the defaults, it worked.