Test mariadb 11.4 build on Epoxy

Author: seunghun1ee

etc/kayobe/stackhpc.yml

@@ -156,7 +156,7 @@ stackhpc_repo_elrepo_9_version: "{{ stackhpc_repo_distribution }}"
 
 # Kolla source repository.
 stackhpc_kolla_source_url: "https://github.com/stackhpc/kolla"
-stackhpc_kolla_source_version: stackhpc/20.1.0.11
+stackhpc_kolla_source_version: test-mariadb-11-4
 
 # Kolla Ansible source repository.
 stackhpc_kolla_ansible_source_url: "https://github.com/stackhpc/kolla-ansible"