Add support for the listing_formats middleware

Change-Id: I0dd121bf866fde715756a6c7c10e6153e17c5d2c

manifests/proxy/listing_formats.pp

@@ -0,0 +1,26 @@
+#
+# Configure swift listing_formats.
+#
+# == Parameters
+#
+# == Examples
+#
+#  include swift::proxy::listing_formats
+#
+# == Authors
+#
+#   Takashi Kajinami <tkajinam@redhat.com>
+#
+# == Copyright
+#
+# Copyright (C) 2021 Red Hat
+#
+class swift::proxy::listing_formats (
+) {
+
+  include swift::deps
+
+  swift_proxy_config {
+    'filter:listing_formats/use': value => 'egg:swift#listing_formats';
+  }
+}

releasenotes/notes/listing_formats-middleware-2ccb0d3462bc1bff.yaml

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+---
+features:
+  - |
+    The new ``swift::proxy::listing_formats`` class has been added.

spec/classes/swift_proxy_listing_formats_spec.rb

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+require 'spec_helper'
+
+describe 'swift::proxy::listing_formats' do
+  shared_examples 'swift::proxy::listing_formats' do
+    describe "when using default parameters" do
+      it { is_expected.to contain_swift_proxy_config('filter:listing_formats/use').with_value('egg:swift#listing_formats') }
+    end
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge(OSDefaults.get_facts())
+      end
+
+      it_configures 'swift::proxy::listing_formats'
+    end
+  end
+end