Fixes
Fixes:
- Fix variable reference before assignment
- Use python3 from LbEnv in the build environment (fix python version mismatches)
Improvements:
- Only delete html test summary after tests are finished
- Adapt advice on getting python 3
- Take ccache from LbEnv
- Update to latest stable LbEnv (1020)
Internal changes:
- Take flake8 and yapf from LbEnv
- Remove trailing comma
- Use LbEnv python3 for distcc (include_server)
- Test external software in CI