Enable SSL proxy middleware configuration

HTTPProxyToWSGI, from oslo.middleware requires a configuration
parameter to be enabled/disabled. This adds it.

Change-Id: I35256153b2f005e729be9d242f63ff14f393b54a

manifests/middleware.pp

@@ -12,11 +12,18 @@
 #   (integer value)
 #   Defaults to $::os_service_default.
 #
+# [*enable_proxy_headers_parsing*]
+#   (Optional) Enables SSL request handling from HTTPProxyToWSGI middleware.
+#   (boolean value)
+#   Defaults to $::os_service_default.
+#
 define oslo::middleware(
-  $max_request_body_size = $::os_service_default,
+  $max_request_body_size        = $::os_service_default,
+  $enable_proxy_headers_parsing = $::os_service_default,
 ) {
   $middleware_options = {
-    'oslo_middleware/max_request_body_size' => { value => $max_request_body_size }
+    'oslo_middleware/max_request_body_size'        => { value => $max_request_body_size },
+    'oslo_middleware/enable_proxy_headers_parsing' => { value => $enable_proxy_headers_parsing },
   }
   create_resources($name, $middleware_options)
 }

spec/defines/oslo_middleware_spec.rb

@@ -9,17 +9,21 @@ describe 'oslo::middleware' do
     context 'with default parameters' do
       it 'configure oslo_middleware default params' do
        is_expected.to contain_keystone_config('oslo_middleware/max_request_body_size').with_value('<SERVICE DEFAULT>')
+       is_expected.to contain_keystone_config('oslo_middleware/enable_proxy_headers_parsing').with_value('<SERVICE DEFAULT>')
       end
 
     end
 
     context 'with overridden parameters' do
       let :params do
-          { :max_request_body_size => 114600,
+          {
+            :max_request_body_size => 114600,
+            :enable_proxy_headers_parsing => true,
           }
       end
       it 'configure oslo_middleware with overriden values' do
         is_expected.to contain_keystone_config('oslo_middleware/max_request_body_size').with_value(114600)
+        is_expected.to contain_keystone_config('oslo_middleware/enable_proxy_headers_parsing').with_value(true)
       end
 
     end