Allow to pass extra attributes to backup PostgreSQL databases

site-cookbooks/backup/templates/default/backup.rb.erb

@@ -17,9 +17,14 @@ KosmosBackup.new(:default, 'default backup') do
 <%- end -%>
 
 <%- if node["backup"]["postgresql"] -%>
-<%- node["backup"]["postgresql"]["databases"].each do |db_name| -%>
-  database PostgreSQL, :"<%= db_name.to_sym %>" do |db|
+<%- node["backup"]["postgresql"]["databases"].each do |db_name, h| -%>
+  database PostgreSQL, :"<%= db_name %>" do |db|
     db.name = "<%= db_name %>"
+    <%- unless h.nil? -%>
+    <%- h.each do |k, v| -%>
+    db.<%= k %> = "<%= v %>"
+    <%- end -%>
+    <%- end -%>
   end
 <%- end -%>
 <%- end -%>