USHIFT-3736: Force NM configuration to allow ipv6

[pacevedom]

/cc @pliurh

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[openshift-ci-robot]

@pacevedom: This pull request references USHIFT-3736 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.17.0" version, but no target version was set.

In response to this:

/cc @pliurh

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[ggiguash]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[pliurh]

LGTM. However, it may be worth mentioning why we want NM to ignore those interfaces in the commit info.

[openshift-ci]

@pacevedom: all tests passed!

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