plotter: make plotter tests idempotent
Created by: kostya-sh
This change renames all golden files from plotter/testdata to have "_golden.png" suffix so running tests do not override them.
Fixes #252 (closed)
Created by: kostya-sh
This change renames all golden files from plotter/testdata to have "_golden.png" suffix so running tests do not override them.
Fixes #252 (closed)