Add designate-producer container

reference:
https://docs.openstack.org/designate/latest/contributor/architecture.html

Change-Id: Ia22128e5ce4a717612af658d63258e78e52176ad

docker/designate/designate-producer/Dockerfile.j2

@@ -0,0 +1,20 @@
+FROM {{ namespace }}/{{ image_prefix }}designate-base:{{ tag }}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+
+{% block designate_producer_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if install_type == 'binary' %}
+    {% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
+       {% set designate_producer_packages = ['openstack-designate-producer'] %}
+    {% elif base_distro in ['debian', 'ubuntu'] %}
+       {% set designate_producer_packages = ['designate-producer'] %}
+    {% endif %}
+{{ macros.install_packages(designate_producer_packages | customizable("packages")) }}
+{% endif %}
+
+{% block designate_producer_footer %}{% endblock %}
+{% block footer %}{% endblock %}
+
+USER designate

releasenotes/notes/add-designate-producer-1420e7c4744e9b09.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add designate-producer image