Add vitrage-persistor image

Kolla was missing vitrage-persistor image required by Vitrage
for data storage.

Change-Id: Id5e143636f9a81e7294b775f3d8b9134bee58054
Closes-Bug: #1869319
(cherry picked from commit ad06096448)

docker/vitrage/vitrage-persistor/Dockerfile.j2

@@ -0,0 +1,42 @@
+FROM {{ namespace }}/{{ image_prefix }}vitrage-base:{{ tag }}
+{% block labels %}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+{% endblock %}
+
+{% block vitrage_persistor_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if install_type == 'binary' %}
+
+    {% if base_package_type == 'rpm' %}
+
+        {% set vitrage_persistor_packages = [
+            'openstack-vitrage-persistor'
+        ] %}
+
+{{ macros.install_packages(vitrage_persistor_packages | customizable("packages")) }}
+
+    {% elif base_package_type == 'deb' %}
+    {% if base_distro == 'debian' %}
+
+        {% set vitrage_persistor_packages = [
+            'vitrage-persistor'
+        ] %}
+
+{{ macros.install_packages(vitrage_persistor_packages | customizable("packages")) }}
+
+    {% else %}
+
+RUN echo '{{ install_type }} not yet available for {{ base_distro }}' \
+    && /bin/false
+
+    {% endif %}
+    {% endif %}
+
+{% endif %}
+
+{% block vitrage_persistor_footer %}{% endblock %}
+{% block footer %}{% endblock %}
+
+USER vitrage

releasenotes/notes/bug-1869319-aa032c1330b540dc.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Adds missing ``vitrage-persistor`` image, required by Vitrage
+    deployments for storing data.
+    `LP#1869319 <https://launchpad.net/bugs/1869319>`__