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: I9ec9282268adc80c947e18c34f34dc0fdd82b187
1 file changed
tree: b2421b4747e4eebf3dd491914cb3eb52c53b28e7
  1. cinder/