Add new roles to OpenStack-Ansible

Two new roles have been asked by the community: a way to
deploy zun, and a way to use qpid dispatch router instead of
rabbitmq.

This patch includes both new roles, as we usually do:
They will be separate of the openstack-ansible main deliverable,
like other roles before it.

Depends-On: https://review.openstack.org/#/c/572551/
Change-Id: I5fb2f24d2eecd38de793a1e739e14614b488e01d

reference/projects.yaml

@@ -2478,6 +2478,9 @@ OpenStackAnsible:
     ansible-config_template:
       repos:
         - openstack/ansible-config_template
+    ansible-role-qdrouterd:
+      repos:
+        - openstack/ansible-role-qdrouterd
     ansible-role-python_venv_build:
       repos:
         - openstack/ansible-role-python_venv_build
@@ -2580,6 +2583,9 @@ OpenStackAnsible:
     openstack-ansible-os_zaqar:
       repos:
         - openstack/openstack-ansible-os_zaqar
+    openstack-ansible-os_zun:
+      repos:
+        - openstack/openstack-ansible-os_zun
     openstack-ansible-specs:
       repos:
         - openstack/openstack-ansible-specs