[CI] Fix the NFV scenario

It seems Aodh started being required.

Change-Id: I01714cbea03bddb0e438aebb197a8a0b2bcdb5b3
Closes-Bug: #1906299
(cherry picked from commit c00e7b2)

Author: yoctozepto

tests/templates/globals-default.j2

@@ -92,6 +92,8 @@ enable_mistral: "yes"
 enable_redis: "yes"
 enable_barbican: "yes"
 enable_heat: "yes"
+# NOTE(yoctozepto): see https://bugs.launchpad.net/kolla-ansible/+bug/1906299
+enable_aodh: "yes"
 {% endif %}
 
 {% if scenario == "ironic" %}