buffet: Update configuration reading for new fields moved from privetd

Removed default_ prefix from default_name and default_description.
Added fields location, model_id, oem_name, model_name.

BUG=brillo:377,brillo:342
TEST=FEATURE=test emerge-gizmo buffet
CQ-DEPEND=CL:266085

Change-Id: I133ac5e41db0d7a7fc67fa0d9773dd1179a90032
Reviewed-on: https://chromium-review.googlesource.com/266028
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
5 files changed
tree: cd47ff3c6d4cc43284803162c04e18c4f93c8293
  1. buffet/