Merge ~raharper/curtin:fix/vmtest-skip-centos70focal-basic into curtin:master

[Ryan Harper]

vmtests: skip Focal deploying Centos70 ScsiBasic

In Focal, there is a bug (#1859858) in udev which returns a
truncated value for ID_SERIAL on some scsi devices; this does
not break dname rules when the ephemeral environment matches
the target system, however if Focal deploys Bionic or in this
case Centos70, the udev in the target system produces a
different ID_SERIAL value which prevents the dname rules from
matching. Skip this test until we get a udev fix.

[Ryan Harper (raharper)]

Note, I'm not linking to the bug as this does not fix it, we're just skipping the test until it's fixed.

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:1a179588a1da9464ce0b5496b57e2f511b56e7d0
https://jenkins.ubuntu.com/server/job/curtin-ci/3810/
Executed test runs:
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-arm64/3810/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-ppc64el/3810/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-s390x/3810/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=torkoal/3810/

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/curtin-ci/3810//rebuild

review: Approve (continuous-integration)

[Dan Watkins (oddbloke)]

I've convinced myself that one week after Feature Freeze is a reasonable time to start seeing this failure. Thanks!

review: Approve

diff --git a/tests/vmtests/test_basic.py b/tests/vmtests/test_basic.py
index c15fe8c..ad68a0d 100644
--- a/tests/vmtests/test_basic.py
+++ b/tests/vmtests/test_basic.py
@@ -402,6 +402,7 @@ class Centos70BionicTestScsiBasic(centos_relbase.centos70_bionic,
     __test__ = True
 
 
[e-mail]_by_date("1859858", fixby="2020-03-06", install=False)
 class Centos70FocalTestScsiBasic(centos_relbase.centos70_focal,
                                  TestBasicScsiAbs, CentosTestBasicAbs):
     __test__ = True