Bump kolla-ansible to stackhpc/16.7.0.20

Author: stackhpc-ci

etc/kayobe/stackhpc.yml

@@ -145,7 +145,7 @@ stackhpc_kolla_source_version: stackhpc/16.6.0.9
 
 # Kolla Ansible source repository.
 stackhpc_kolla_ansible_source_url: "https://github.com/stackhpc/kolla-ansible"
-stackhpc_kolla_ansible_source_version: stackhpc/16.7.0.19
+stackhpc_kolla_ansible_source_version: stackhpc/16.7.0.20
 
 ###############################################################################
 # Container image registry