Merge ~seyeongkim/maas:lp1929478 into maas:master

[Seyeong Kim]

Fix utf-8 character error when bmc-config

Related LP and article

https://bugs.launchpad.net/bugs/1892983
https://bugs.launchpad.net/bugs/1929478
https://discourse.maas.io/t/maas-failed-commissioning/4904

[Seyeong Kim (seyeongkim)]

this is rough commit,
Please advise any. I wasn't able to test this but refered to https://discourse.maas.io/t/maas-failed-commissioning/4904

[MAAS Lander (maas-lander)]

UNIT TESTS
-b lp1929478 lp:~seyeongkim/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: FAILED
LOG: http://maas-ci.internal:8080/job/maas/job/branch-tester/13038/console
COMMIT: 8b7025ebafc5e40203c2fc3c28809a9c75e19374

review: Needs Fixing

[MAAS Lander (maas-lander)]

UNIT TESTS
-b lp1929478 lp:~seyeongkim/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: SUCCESS
COMMIT: 744c545cbbfe18dd464cdf6787353a8f60c9d267

review: Approve

[Alexsander de Souza (alexsander-souza)]

see comment inline

review: Needs Fixing

[MAAS Lander (maas-lander)]

UNIT TESTS
-b lp1929478 lp:~seyeongkim/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: SUCCESS
COMMIT: 67ddce79a0fd90c4d45798a1e325017aa3656e07

review: Approve

[Alexsander de Souza (alexsander-souza)]

+1

review: Approve

[MAAS Lander (maas-lander)]

LANDING
-b lp1929478 lp:~seyeongkim/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: FAILED BUILD
LOG: http://maas-ci.internal:8080/job/maas/job/branch-tester/13056/consoleText

diff --git a/src/metadataserver/builtin_scripts/commissioning_scripts/bmc_config.py b/src/metadataserver/builtin_scripts/commissioning_scripts/bmc_config.py
index a4c791f..4964f08 100755
--- a/src/metadataserver/builtin_scripts/commissioning_scripts/bmc_config.py
+++ b/src/metadataserver/builtin_scripts/commissioning_scripts/bmc_config.py
@@ -242,7 +242,7 @@ class IPMIBase(BMCConfig):
             )
             raise
         section = None
-        for line in proc.stdout.decode().splitlines():
+        for line in proc.stdout.decode(errors="surrogateescape").splitlines():
             line = line.split("#")[0].strip()
             if not line:
                 continue