Rolled back Ansible version in travis test.
Rolled back Ansible version in travis test.

jcalazan/ansible-django-stack,YPCrumble/ansible-django-stack,DavidCain/mitoc-ansible,YPCrumble/ansible-django-stack,DavidCain/mitoc-ansible,jcalazan/ansible-django-stack,DavidCain/mitoc-ansible,jcalazan/ansible-django-stack,YPCrumble/ansible-django-stack