DIST: Do not use conditional include for template files
    
    We do not use AC_CONFIG_FILES in configure.ac for replacing some values
    at configure time because we need to replace them at build time in make.
    
    And because such files are not listed in AC_CONFIG_FILES we need to have
    them in the automake variable EXTRA_DIST. And they must not be included
    conditionally. We want to have always in dist tarball besides. It must
    not depend on the configuration of system which was used for generating
    tarball
    
    The automake documentation says:
      Still, sometimes there are files which must be distributed, but which
      are not covered in the automatic rules. These files should be listed
      in the EXTRA_DIST variable.
    
    Merges: https://pagure.io/SSSD/sssd/pull-request/3929
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>