Add cloud-provider-openstack testgrid config
Add cloud-provider-openstack testgrid config

OpenLab support to run k8s conformance e2e tests with
cloud-provider-openstack, and upload the test result to testgrid.
This patch aims to add config to testgrid side so that test result
can be shown.

Partial-Bug: theopenlab/openlab-zuul-jobs#139

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid