[dashboard] neutron-lbaas is deprecated

[Samuel Cassiba]

Aug 18 17:11:42 dev0001 python[7191]: INSTALLED_APPS,
Aug 18 17:11:42 dev0001 python[7191]: File "/usr/share/openstack-dashboard/openstack_dashboard/utils/settings.py", line 130, in update_dashboards
Aug 18 17:11:42 dev0001 python[7191]: module = import_module(_app)
Aug 18 17:11:42 dev0001 python[7191]: File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
Aug 18 17:11:42 dev0001 python[7191]: __import__(name)
Aug 18 17:11:42 dev0001 python[7191]: ImportError: No module named neutron_lbaas_dashboard
Aug 18 17:11:42 dev0001 systemd[1]: httpd.service: control process exited, code=exited status=1
Aug 18 17:11:42 dev0001 systemd[1]: Failed to start The Apache HTTP Server.
Aug 18 17:11:42 dev0001 systemd[1]: Unit httpd.service entered failed state.
Aug 18 17:11:42 dev0001 systemd[1]: httpd.service failed.

Additional context: https://wiki.openstack.org/wiki/Neutron/LBaaS/Deprecation