Add the u20->u22 openstack workflow #21

Job	Run time
testsuite / testsuite	3m 6s
terraform_openstack_create	2m 33s
clone_elevate_repo	6s
setup_integration_checks	5s
start_elevate	17m 48s
wait_for_stage_1_reboot	30s
watch_for_stage_2_reboot	6s
wait_for_stage_2_reboot	6s
watch_for_stage_3_reboot	2m 15s
wait_for_stage_3_reboot	1s
watch_for_stage_4_reboot	1s
wait_for_stage_4_reboot	1s
watch_for_stage_5_reboot	1s
wait_for_stage_5_reboot	1s
watch_for_final_reboot	1s
wait_for_final_reboot	1s
verify_upgraded_os	1s
terraform_openstack_destroy	1s
	26m 44s

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