Fixed a test that relied on database exceptions not being wrapped.

from django.conf import settings

from django.core.management.color import no_style

from django.db import (backend, connection, connections, DEFAULT_DB_ALIAS,

    IntegrityError, transaction)

    DatabaseError, IntegrityError, transaction)

from django.db.backends.signals import connection_created

from django.db.backends.postgresql_psycopg2 import version as pg_version

from django.db.models import Sum, Avg, Variance, StdDev

        connection.settings_dict['PASSWORD'] = "françois"

        try:

            cursor = connection.cursor()

        except backend.Database.DatabaseError:

        except DatabaseError:

            # As password is probably wrong, a database exception is expected

            pass

        except Exception as e: