Fixes traceback when printing XLS reports in ptBR.

(cherry picked from commit 0c1fd196bbe7d2a4ec36cc3224ffc6be859866aa)

Change-Id: I57890e4d43cdb9e2a7378f6b14451a21e7ffcd69
config wizard: Assume all errors are auth

Assume all errors when trying to connect to the local
database are authentication errors. On a default
Ubuntu 12.10 install with PostgreSQL 9.1 we get:

  FATAL: role "stoq" does not exist.

This patch works that around by ignoring the error,
the user will be created properly later on when
running stoqdbadmin init

(cherry picked from commit 27d5dcf470d465fd3e2c1d9d75b32a32f5fba49a)

Change-Id: Ib93923b1a813e266ce98ac0ed275daf8cc6a439a
Merge changes Ib93923b1,I57890e4d into 1.7

* changes:
  config wizard: Assume all errors are auth
  Fixes traceback when printing XLS reports in ptBR.