Use zuul_legacy_vars for propose jobs for now
Use zuul_legacy_vars for propose jobs for now

We need to rework this completely to be v3 native. For now, just grab
the legacy vars.

Change-Id: I49613839b96b72ced4cb6b1733ef3fa6531dcb66

openstack-infra/project-config,openstack-infra/project-config