[Contrail 5.0.0] Autoscaling test failed after deploy with ceilometer

[Yevgeniy]

Steps to reproduce:
            1. Create an environment with "Neutron with tunneling
               segmentation" as a network configuration and CEPH storage
            2. Enable and configure Contrail plugin
            3. Add a node with "controller" role
            4. Add a node with "controller" + "MongoDB" multirole
            5. Add a node with "controller"+ "ceph-OSD" multiroles
            6. Add a node with "compute" + "ceph-OSD" + "cinder" multiroles
            7. Add a node with "compute" + "ceph-OSD" multiroles
            8. Add a node with "MongoDB" role
            9. Add a node with "contrail-config", "contrail-control",
                "contrail-db" and "contrail-analytics" roles
            10. Deploy cluster with plugin
            11. Run contrail health check tests
            12. Run OSTF tests
Actual result:
AssertionError: Failed 1 OSTF tests; should fail 0 tests. Names of failed tests:
  - Check stack autoscaling (failure) Time limit exceeded while waiting for terminating the 2nd instance per autoscaling alarm to finish. Please refer to OpenStack logs for more details.