proper system user name

Index: lib/puppetserver/ca/utils/file_system.rb
--- lib/puppetserver/ca/utils/file_system.rb.orig
+++ lib/puppetserver/ca/utils/file_system.rb
@@ -74,8 +74,8 @@ module Puppetserver
         # is a symlink it operates on the link itself rather than its target.
         def self.ensure_ownership(path)
           return unless running_as_root?
-          user = pe_puppet_exists? ? 'pe-puppet' : 'puppet'
-          group = pe_puppet_exists? ? 'pe-puppet' : 'puppet'
+          user = pe_puppet_exists? ? 'pe-puppet' : '_puppet'
+          group = pe_puppet_exists? ? 'pe-puppet' : '_puppet'
           FileUtils.chown(user, group, path)
         end
 
