Add Django1.8 to tests
Add Django1.8 to tests

Change-Id: I8c6c03bcd7cfc96ccefc7703fb21c9e1a45c1b1f
Partially-Implements: blueprint django18

openstack/senlin-dashboard,openstack/senlin-dashboard,openstack/senlin-dashboard,openstack/senlin-dashboard,stackforge/senlin-dashboard,stackforge/senlin-dashboard,stackforge/senlin-dashboard