Problem: no ipv6 test coverage

[sigiesec]

Solution: add arm64 test coverage job, where ipv6 is available

Also temporarily disable two zmq_socket_monitor_pipes_stats test cases that
permananently fail on arm64.

[sigiesec]

I wonder why it looks as if all job definitions were changed in .travis.yml... Maybe the indentation changed or so, I will try to get that fixed.

[bluca]

I wonder why it looks as if all job definitions were changed in .travis.yml... Maybe the indentation changed or so, I will try to get that fixed.

yeah, it's whitespace changes

[sigiesec]

#4120 now added a non-coverage ARM64 job, so this PR should be changed to just make that into a coverage job.

[stale]

This issue has been automatically marked as stale because it has not had activity for 365 days. It will be closed if no further activity occurs within 56 days. Thank you for your contributions.