Cleanup using about the data_utils module and functions again

HACKING officially discourages symbol import directly because it makes
it harder to track down that a function was imported. Recently, we keep
this rule and almost files were already fixed in
  Ibda1a5e424280bad8535ee27f66dec99bf68f676 .
But some files are not fixed. This commit cleanups them.

Change-Id: I92bf9097860738fbb79fad274b3e4cce07481f39
3 files changed