Add support for metadata

	enable defining known_hosts via metadata in other formulas

Related: PROD-25696

Change-Id: I821d51675700719d665259a4ed24a30667b7fd0c
diff --git a/openssh/client/known_host.sls b/openssh/client/known_host.sls
index 664e138..edc6746 100644
--- a/openssh/client/known_host.sls
+++ b/openssh/client/known_host.sls
@@ -4,7 +4,18 @@
 include:
 - openssh.client.service
 
-{%- for xxx, user in client.get('user', {}).iteritems() %}
+{%- set _users = client.get('user', {}) %}
+{%- for service_name, service in pillar.items() %}
+  {%- set support_fragment_file = service_name+'/meta/openssh.yml' %}
+  {%- macro load_support_file() %}{% include support_fragment_file ignore missing %}{% endmacro %}
+  {%- set support_yaml = load_support_file()|load_yaml %}
+
+  {%- if support_yaml and support_yaml.get('user', {}) %}
+    {%- do _users.update(support_yaml.get('user', {})) %}
+  {%- endif %}
+{%- endfor %}
+
+{%- for xxx, user in _users.iteritems() %}
 
 {%- if user.get('purge_undefined', False) %}
 {{ user.user.name }}_remove_old_known_hosts_file: