[bugfix] Use btrfs family for old tests in logentries_tests.py
- Other wowwiki sites are merged to ME 1.33. Use btrfs family for 'old' test which is still 1.19.24
- Create btrfs family as AutoFamily and assign it to the sites dict
- update aspects to use AutoFamily.name if no str is given with sites['family']
Bug: T268971
Change-Id: Ibf1c1a14836557621aac6acc4489ef9c1e37afa6