Placement: Enable proxy headers parsing

... so that the actual client ip, instead of haproxy ip, is logged in
placement logs.

Depends-on: https://review.opendev.org/800690
Change-Id: Ia69436808b0d739c41c4980bacaf4f510f3762f9

deployment/placement/placement-api-container-puppet.yaml

@@ -151,6 +151,7 @@ outputs:
         map_merge:
           - get_attr: [PlacementLogging, config_settings]
           - apache::default_vhost: false
+            placement::api::enable_proxy_headers_parsing: true
             placement::keystone::authtoken::project_name: 'service'
             placement::keystone::authtoken::password: {get_param: PlacementPassword}
             placement::keystone::authtoken::www_authenticate_uri: {get_param: [EndpointMap, KeystonePublic, uri_no_suffix]}