Fix Barbican gate

This patch fixes a zuul syntax error due to a deprecated definition that
was still in use in our configuration.

It also makes the grenade job non-voting as it is currently failing.  A
follow up patch will fix grenade and re-enable voting.

Change-Id: I271a3d50dba5f1c7c58c01838fa68b4c8adbd72c

.zuul.yaml

@@ -96,6 +96,7 @@
       tox_envlist: all
 
 - project:
+    queue: barbican
     templates:
       - check-requirements
       - openstack-cover-jobs
@@ -107,7 +108,8 @@
         - barbican-tox-functional
         - barbican-vault-tox-functional:
             voting: false
-        - barbican-grenade
+        - barbican-grenade:
+            voting: false
         - barbican-tempest-plugin-simple-crypto
         - barbican-tempest-plugin-simple-crypto-secure-rbac
         - barbican-tempest-plugin-simple-crypto-ipv6-only
@@ -121,7 +123,6 @@
         - tripleo-ci-centos-9-scenario002-standalone:
             voting: false
     gate:
-      queue: barbican
       jobs:
         - barbican-tox-functional
     experimental: