Add the u20->u22 openstack workflow #27

Job	Run time
testsuite / testsuite	3m 7s
terraform_openstack_create	2m 36s
clone_elevate_repo	6s
setup_integration_checks	5s
start_elevate	16m 30s
wait_for_stage_1_reboot	5s
watch_for_stage_2_reboot	6s
wait_for_stage_2_reboot	4s
watch_for_stage_3_reboot	4m 50s
wait_for_stage_3_reboot	28s
watch_for_stage_4_reboot	18m 24s
wait_for_stage_4_reboot	0s
watch_for_stage_5_reboot	0s
wait_for_stage_5_reboot	0s
watch_for_final_reboot	0s
wait_for_final_reboot	0s
verify_upgraded_os	0s
terraform_openstack_destroy	0s
	46m 21s

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