Refactor bios error test script with python and add unit tests (New)

[Artur-at-work]

Description

Refactor bios-error.sh script in Python and added unit tests to follow the requirements from providers/base. This script still in contrib/pc-sanity to verify change didn't break the logic. After several pc-sanity releases, this can be candidate to PR into base provider.

Resolved issues

Closes https://warthogs.atlassian.net/browse/OEX86-876

Documentation

Tests

On local, use manage.py inside provider

$ ./manage.py test
.........................................................................................................
----------------------------------------------------------------------
Ran 105 tests in 3.774s

OK

$ ./manage.py test -k acpi_bios_error -v
test_flake8_/home/artur/workspace/checkbox/contrib/pc-sanity/bin/acpi_bios_error.py (plainbox.provider_manager.Flake8Tests.test_flake8_/home/artur/workspace/checkbox/contrib/pc-sanity/bin/acpi_bios_error.py) ... ok
test_check_acpi_bios_errors_found (test_acpi_bios_error.TestAcpiBiosError.test_check_acpi_bios_errors_found)
Test when ACPI BIOS errors are detected. ... ok
test_check_acpi_bios_errors_no_errors (test_acpi_bios_error.TestAcpiBiosError.test_check_acpi_bios_errors_no_errors)
Test when no ACPI BIOS errors are found. ... ok

----------------------------------------------------------------------
Ran 3 tests in 0.216s

OK

On DUT, update provider and plan, then run with checkbox-cli

------------------------------------------------------------------------ >8 ---
Outcome: job passed
========[ Running job 28 / 28. Estimated time left (at least): 0:00:00 ]========
------------------[ Check if kernel reports ACPI BIOS Error ]-------------------
ID: com.canonical.certification::miscellanea/acpi-bios-error_GenuineIntel
Category: com.canonical.plainbox::miscellanea
... 8< -------------------------------------------------------------------------
No ACPI BIOS errors detected in current boot
------------------------------------------------------------------------- >8 ---
Outcome: job passed

[pseudocc]

1st comment: request changes.
2nd comment: okay to leave it unchanged, but recommend.

[pseudocc]

LGTM now, thanks!

[xanthein]

LGTM, thanks