Use an explicit image tag for Ussuri Neutron SRIOV agent

etc/kayobe/kolla/globals.yml

@@ -124,5 +124,8 @@ octavia_service_auth_project: octavia-lbs
 # These should be allowed to change independently, as services are updated.
 # If there are no custom images this comment serves as a placeholder.
 # Keep Manila on CentOS7 train as we need access to a Ceph Luminous repo for Ceph RPMs;
-manila_share_tag: "train-20220713T121439"
-nova_tag: ussuri-20220922150639 # libvirt cpu_compare workaround
+manila_share_tag: train-20220713T121439
+# Nova: libvirt cpu_compare workaround
+nova_tag: ussuri-20220922150639
+# Use explicit built SRIOV agent tag until Neutron tags can be unified
+neutron_sriov_agent_tag: ussuri-20230117134348