Merge ~smoser/cloud-init:fix-test_netconfig into cloud-init:master

[Scott Moser]

Fix unit test when running in a system deployed with cloud-init.

test_netconfig.py:test_apply_network_config_eni_ub would attempt to
remove any .link files that cloud-init had written. This was just
a failure to mock out all of its interaction with the host.

[Joshua Powers (powersj)]

Tested and working on torkoal. Thanks!

review: Approve

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

PASSED: Continuous integration, rev:192dbda37b50aa97f87976879dd177834a986123
https://jenkins.ubuntu.com/server/job/cloud-init-ci/148/
Executed test runs:
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-amd64/148
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-arm64/148
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-ppc64el/148
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-s390x/148
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=vm-i386/148

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/148/rebuild

review: Approve (continuous-integration)

[Ryan Harper (raharper)]

review: Approve

diff --git a/tests/unittests/test_distros/test_netconfig.py b/tests/unittests/test_distros/test_netconfig.py
index b89b74f..8837066 100644
--- a/tests/unittests/test_distros/test_netconfig.py
+++ b/tests/unittests/test_distros/test_netconfig.py
@@ -236,6 +236,9 @@ class TestNetCfgDistro(TestCase):
                 mock.patch.object(util, 'write_file', replace_write))
             mocks.enter_context(
                 mock.patch.object(os.path, 'isfile', return_value=False))
+            mocks.enter_context(
+                mock.patch("cloudinit.net.eni.glob.glob",
+                           return_value=[]))
 
             ub_distro.apply_network_config(V1_NET_CFG, False)