Fix failing tests since we now live in 2016
Fix failing tests since we now live in 2016

The tests check if the year 2010 is a valid option but since only the
last 5 years are rendered this is no longer the case. For now I've
changed the tests to check if 2014 is valid which should be the case the
next few years. A better option is to use the `freezegun` module in the
future.

john-parton/django-oscar,sonofatailor/django-oscar,john-parton/django-oscar,ka7eh/django-oscar,ka7eh/django-oscar,okfish/django-oscar,WillisXChen/django-oscar,WillisXChen/django-oscar,michaelkuty/django-oscar,solarissmoke/django-oscar,django-oscar/django-oscar,WillisXChen/django-oscar,django-oscar/django-oscar,WillisXChen/django-oscar,michaelkuty/django-oscar,john-parton/django-oscar,anentropic/django-oscar,okfish/django-oscar,WillisXChen/django-oscar,okfish/django-oscar,ka7eh/django-oscar,django-oscar/django-oscar,john-parton/django-oscar,solarissmoke/django-oscar,michaelkuty/django-oscar,sasha0/django-oscar,sonofatailor/django-oscar,spartonia/django-oscar,anentropic/django-oscar,spartonia/django-oscar,anentropic/django-oscar,ka7eh/django-oscar,WillisXChen/django-oscar,sonofatailor/django-oscar,sasha0/django-oscar,michaelkuty/django-oscar,spartonia/django-oscar,django-oscar/django-oscar,spartonia/django-oscar,sasha0/django-oscar,sasha0/django-oscar,okfish/django-oscar,solarissmoke/django-oscar,solarissmoke/django-oscar,sonofatailor/django-oscar,anentropic/django-oscar