CI: controller_nova index configuration produces warnings

[displague]

controller_nova index configuration produces warnings:

null_resource.controller-nova (remote-exec): /usr/lib/python3/dist-packages/pymysql/cursors.py:165: Warning: (1831, 'Duplicate index `block_device_mapping_instance_uuid_virtual_name_device_name_idx`. This is deprecated and will be disallowed in a future release.')
null_resource.controller-nova (remote-exec):   result = self._query(query)
null_resource.controller-nova (remote-exec): /usr/lib/python3/dist-packages/pymysql/cursors.py:165: Warning: (1831, 'Duplicate index `uniq_instances0uuid`. This is deprecated and will be disallowed in a future release.')
null_resource.controller-nova (remote-exec):   result = self._query(query)