packaging: setup: remove dependency loop in setup

Avoid to require odwhcons.Stages.DB_CREDENTIALS_AVAILABLE
in schema validation stage while it's provided by
pgpass misc stage.

Avoid loop in dependency resolution since misc is after
validation.

Change-Id: Idd0956e6fb7eea724624b85689bcd2b9dbe8bb8f
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>