Remove Python 3.3 support
Remove Python 3.3 support

We never tested it.

Change-Id: I0a1ad1fb4a86f4d226a544e60ddb475b4b31d582

gnocchixyz/python-gnocchiclient,chungg/python-aodhclient,openstack/python-aodhclient,chungg/python-aodhclient,sileht/python-gnocchiclient,gnocchixyz/python-gnocchiclient