Disable "oslo.messaging" metrics
Disable "oslo.messaging" metrics

Since [1], "oslo.messaging" provides a feature to send RPC metrics
to "oslo.metrics". This patch is breaking the CI unit tests jobs.

Because those metrics are not needed in this CI, this patch disables
this feature.

[1]https://review.opendev.org/c/openstack/oslo.messaging/+/761848

Change-Id: I8611e140305636685c1532dc36812d24a234dc9b
Closes-Bug: #1941725

openstack/neutron-lib,openstack/neutron-lib,openstack/neutron-lib,openstack/neutron-lib