Pin elasticsearch-curator==5.8.4

elasticsearch-curator 8 is out and is incompatible with Elasticsearch 7 release.
We pin curator version to release 5.8.4 which should support any Elasticsearch
7.x releases [1].
As elasticsearch has been dropped from Zed onwards, this only applies to Yoga
and below.

1. https://www.elastic.co/guide/en/elasticsearch/client/curator/5.8/version-compatibility.html

Closes-Bug: #2028048
Change-Id: I976781ed0bdc47760163e25c480ca8fe93f66517

Author: Lukasz Zalewski

docker/elasticsearch/elasticsearch-curator/Dockerfile.j2

@@ -27,7 +27,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 # NOTE(parallax): pin elasticsearch due to bug: https://bugs.launchpad.net/kolla/+bug/1941073
 {% set elasticsearch_curator_pip_packages = [
     'elasticsearch==7.13.*',
-    'elasticsearch-curator'
+    'elasticsearch-curator==5.8.4'
 ] %}
 
 RUN {{ macros.install_pip(['pip', 'wheel', 'setuptools'], constraints=false) }} \

releasenotes/notes/fix-elasesticsearch-curator-f2f154dc707d15bd.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixes an issue with Elasticsearch curator not working due
+    to too new python elasticsearch-curator library not compatible
+    with Elasticsearch version 7.
+    `LP#2028048 <https://launchpad.net/kolla/+bug/2028048>`__