Blacklist Calico's VXLAN interface from NetworkManager

[nightkr]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Calico sometimes gets into a fight with NetworkManager about who "owns" the calico.vxlan interface, rapidly bringing it up and down, in turn breaking all pod traffic.

Which issue(s) this PR fixes:

projectcalico/calico#3271

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Fixed NetworkManager sometimes breaking Calico's VXLAN mode

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[k8s-ci-robot]

Hi @teozkr. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[floryut]

@teozkr Thank you for the PR, could you please sign CLA ?

[nightkr]

I've lifted it for approval internally. Will come back when I have a response from there..

[champtar]

@teozkr commit message is wrong, "calico.vxlan" vs "vxlan.calico". Commit is ok.

[nightkr]

@floryut CLA should be sorted out now.

@champtar Thanks, fixed.

[champtar]

rebase to fix the ci failure

[LuckySB]

/ok-to-test
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: LuckySB, teozkr

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[LuckySB]

/lgtm