Bump kolla-ansible to stackhpc/18.7.0.15

Author: stackhpc-ci

etc/kayobe/stackhpc.yml

@@ -185,6 +185,7 @@ stackhpc_kolla_ansible_source_url: "https://github.com/stackhpc/kolla-ansible"
 <<<<<<< HEAD
 <<<<<<< HEAD
 <<<<<<< HEAD
+<<<<<<< HEAD
 stackhpc_kolla_ansible_source_version: stackhpc/20.2.0.9
 =======
 stackhpc_kolla_ansible_source_version: stackhpc/18.7.0.12
@@ -195,6 +196,9 @@ stackhpc_kolla_ansible_source_version: stackhpc/18.7.0.13
 =======
 stackhpc_kolla_ansible_source_version: stackhpc/18.7.0.14
 >>>>>>> 5eb18c86 (Bump kolla-ansible to stackhpc/18.7.0.14 (#1856))
+=======
+stackhpc_kolla_ansible_source_version: stackhpc/18.7.0.15
+>>>>>>> d53541f1 (Bump kolla-ansible to stackhpc/18.7.0.15)
 
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 # Container image registry