senlin dashboard can not enable

[Ethan Lynn]

When I only set following configuration in local.conf, devstack can not enable senlin-dashboard
enable_plugin senlin https://git.openstack.org/openstack/senlin $OS_BRANCH

I met following error

2017-03-17 08:55:35.264 | +^[[38;5;242mlib/horizon:init_horizon:153 ^[[m^O django-admin collectstatic --noinput
2017-03-17 08:55:36.085 | WARNING:root:Error importing openstack_dashboard.local.enabled._50_senlin
2017-03-17 08:55:36.085 | ERROR:root:No module named _50_senlin
2017-03-17 08:55:36.085 | Traceback (most recent call last):
2017-03-17 08:55:36.085 | File "/opt/stack/horizon/openstack_dashboard/utils/settings.py", line 29, in import_submodules
2017-03-17 08:55:36.085 | submodule = import_module(name)
2017-03-17 08:55:36.085 | File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
2017-03-17 08:55:36.085 | __import__(name)
2017-03-17 08:55:36.085 | ImportError: No module named _50_senlin

Do I need to enable senlin-dashboard explicitly like following?
enable_plugin senlin-dashboard https://git.openstack.org/openstack/senlin-dashboard

[Ethan Lynn (ethanlynn)]

Add enable_plugin senlin-dashboard https://git.openstack.org/openstack/senlin-dashboard to local.conf and it work.