Switch to use stable data_utils

Tempest provides stable library interfaces under tempest.lib.
This patch switches to use it for data_utils.

Change-Id: Ia331ec10a84118e5d72a95f8f8b86509f57232a1
1 file changed
tree: 90db8ec32791c1f48e3b75471b571e3fda54dc15
  1. manila_tempest_tests/