[TEST] asset: fix demo data to use relative date to prevent unit test failure on january, 1st
[TEST] asset: fix demo data to use relative date to prevent unit test failure on january, 1st

bzr revid: xal@openerp.com-20130102091818-vflxv299ejr3ckvn
podemos-info/odoo,podemos-info/odoo,podemos-info/odoo,podemos-info/odoo,podemos-info/odoo,podemos-info/odoo,podemos-info/odoo