Move remove_uwsgi_config to cleanup_placement

It had been in stop_placement, but we don't want it there: the old
side of grenade needs to call that but should not remove the uwsgi
configuration when doing so. It is configuration, after all.

Change-Id: Iee763adf7895145d97b184924896db3f1f48a015
Partial-Bug: #1736385
diff --git a/lib/placement b/lib/placement
index d3fb8c8..1875857 100644
--- a/lib/placement
+++ b/lib/placement
@@ -71,6 +71,7 @@
 function cleanup_placement {
     sudo rm -f $(apache_site_config_for nova-placement-api)
     sudo rm -f $(apache_site_config_for placement-api)
+    remove_uwsgi_config "$PLACEMENT_UWSGI_CONF" "$PLACEMENT_UWSGI"
 }
 
 # _config_placement_apache_wsgi() - Set WSGI config files
@@ -188,7 +189,6 @@
 function stop_placement {
     if [[ "$WSGI_MODE" == "uwsgi" ]]; then
         stop_process "placement-api"
-        remove_uwsgi_config "$PLACEMENT_UWSGI_CONF" "$PLACEMENT_UWSGI"
     else
         disable_apache_site placement-api
         restart_apache_server