It looks like deployment does not have `type` attribute anymore:
2018-12-20 11:31:56.827 32486 ERROR rally.task.hook
File "/opt/stack/rally-openstack/rally_openstack/hook/fault_injection.py",
line 61, in get_cloud_config
2018-12-20 11:31:56.827 32486 ERROR rally.task.hook
if deployment_config["type"] != "ExistingCloud":
2018-12-20 11:31:56.827 32486 ERROR rally.task.hook KeyError: 'type'
Also correct parent class of FaultInjectionHook to avoid deprecation warning.
Change-Id: I2783757386c997a6555e6338aebcda4f9a5f31fa