Improve test coverage: project API
Improve test coverage: project API

Add tests for creating/deleting/updating projects in keystone
version 2 and 3.

Change-Id: I0ce7e122f40dfdcdd4b885e3c1be02ad9306e8b1

stackforge/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,openstack/python-openstacksdk,openstack-infra/shade,dtroyer/python-openstacksdk,openstack-infra/shade