Revert "Use ddt.named_data decorator to avoid random test names"

This reverts commit 4b26d79ba76792f53f77f3eceaf49b24e0e1578f.

Reason for revert: This can be backwards compatible. We want to revert it for now.

Change-Id: Ica4a6ff8f655d372baee73c2daab8517188655aa
3 files changed