[test] Check grafana dashboards UI test failed

[Rodion Promyshlennikov]

Steps to reproduce:
Run check_display_dashboards_influxdb_grafana or check_display_grafana_dashboards_toolchain test

Expected result:
Test passed

Actual result:
Test failed with AssertionError: There is not enough panels in available panels, panels that are not presented: set(['haproxy', 'nova', 'hypervisor', 'system', 'influxdb', 'heat', 'keystone', 'rabbitmq', 'mysql', 'apache', 'elasticsearch', 'glance', 'cinder', 'memcached', 'lma self-monitoring', 'neutron'])

It's regression after 98bedc5de31e1c236f81fb73718aeb59c0b93595 commit with LDAP tests.

[Rodion Promyshlennikov (rpromyshlennikov)]

Fix committed https://review.openstack.org/#/c/371021/