Add support for the interface parameter in authtoken middleware

This patch adds support for [keystone_authtoken] interface parameter,
so that operators can define which endpoint should be used by authtoken
middleware.

Change-Id: I494c1e25c98a57b78c779bcd0bf30c92fe70ff0a
(cherry picked from commit 02f935237d)
(cherry picked from commit a0e4625686)

manifests/keystone/authtoken.pp

@@ -172,6 +172,11 @@
 #   true/false
 #   Defaults to $::os_service_default.
 #
+# [*interface*]
+#  (Optional) Interface to use for the Identity API endpoint. Valid values are
+#  "public", "internal" or "admin".
+#  Defaults to $::os_service_default.
+#
 class designate::keystone::authtoken(
   $username                       = 'designate',
   $password                       = $::os_service_default,
@@ -206,6 +211,7 @@ class designate::keystone::authtoken(
   $region_name                    = $::os_service_default,
   $token_cache_time               = $::os_service_default,
   $service_token_roles_required   = $::os_service_default,
+  $interface                      = $::os_service_default,
 ) {
 
   include ::designate::deps
@@ -248,5 +254,6 @@ class designate::keystone::authtoken(
     region_name                    => $region_name,
     token_cache_time               => $token_cache_time,
     service_token_roles_required   => $service_token_roles_required,
+    interface                      => $interface,
   }
 }

releasenotes/notes/keystone-authtoken-interface-3d1e14584c143ef2.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The new ``designate::keystone::authtoken::interface`` parameter has been added,
+    which can be used to set the interface parameter in authtoken middleware.

spec/classes/designate_keystone_authtoken_spec.rb

@@ -43,6 +43,7 @@ describe 'designate::keystone::authtoken' do
         is_expected.to contain_designate_config('keystone_authtoken/region_name').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('keystone_authtoken/token_cache_time').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('keystone_authtoken/service_token_roles_required').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_designate_config('keystone_authtoken/interface').with_value('<SERVICE DEFAULT>')
       end
     end
 
@@ -82,6 +83,7 @@ describe 'designate::keystone::authtoken' do
           :region_name                          => 'region2',
           :token_cache_time                     => '301',
           :service_token_roles_required         => false,
+          :interface                            => 'internal',
         })
       end
 
@@ -118,6 +120,7 @@ describe 'designate::keystone::authtoken' do
         is_expected.to contain_designate_config('keystone_authtoken/region_name').with_value(params[:region_name])
         is_expected.to contain_designate_config('keystone_authtoken/token_cache_time').with_value(params[:token_cache_time])
         is_expected.to contain_designate_config('keystone_authtoken/service_token_roles_required').with_value(params[:service_token_roles_required])
+        is_expected.to contain_designate_config('keystone_authtoken/interface').with_value(params[:interface])
       end
 
       it 'installs python memcache package' do