Patroni configuration saves replication password in supported format

We are not relying on `sql_replication_password` as we need it in cleartext here.

files/gitlab-cookbooks/patroni/attributes/default.rb

@@ -15,6 +15,8 @@ default['patroni']['max_timelines_history'] = 0
 default['patroni']['master_start_timeout'] = 300
 default['patroni']['use_pg_rewind'] = false
 default['patroni']['use_slots'] = true
+default['patroni']['replication_user'] = node['postgresql']['sql_replication_user']
+default['patroni']['replication_password'] = nil
 default['patroni']['replication_slots'] = {}
 # Standby cluster replication settings

files/gitlab-cookbooks/patroni/templates/default/patroni.yaml.erb

@@ -19,9 +19,9 @@ postgresql:
     superuser:
       username: <%= account_helper.postgresql_user %>
     replication:
-      username: <%= @postgresql_defaults['sql_replication_user'] %>
-<% if @postgresql_defaults['sql_replication_password'] %>
-      password: <%= "md5#{@postgresql_defaults['sql_replication_password']}" %>
+      username: <%= @replication_user %>
+<% if @replication_password %>
+      password: <%= "#{@replication_password}" %>
 <% end %>
 bootstrap:
   dcs: <%= patroni_helper.dynamic_settings.to_json %>