Concat 2.0 deprecation warnings

[madAndroid]

We're seeing these warnings when using the location resource:

Passing a value other than 'present' or 'absent' as the $ensure parameter to concat::fragment is deprecated.

This appears to be happening here: https://github.com/jfryman/puppet-nginx/blob/master/manifests/resource/location.pp#L378-L391

    concat::fragment { "${vhost_sanitized}-${priority}-${location_md5}":
      ensure  => $ensure_real,
      target  => $config_file,
      content => join([
        template('nginx/vhost/location_header.erb'),
        $content_real,
        template('nginx/vhost/location_footer.erb')
      ], ''),
      order   => $priority,
    }