(PUP-266) Puppet manages group and owner on config

 - Previously, Puppet would ignore the configuration in defaults.rb for
   setting a group / owner on a given file or directory -- even when
   the Windows machine was running with administrative permissions
 - Since Windows now has the capability of properly setting a group
   and owner, allow Windows to manage these permissions when
   appropriate
 - The existing Puppet::Settings::FileSettings::Service class
   depends on looking up the appropriate default service accounts
   for use in a number of locations. To fall in line with this usage
   pattern, "Administrators" is set as the default owner and
   the "Service" group S-1-5-6 is set as the default group.  This
   special OS managed group includes all accounts with the logon
   as a service token privilege.