[DVR] Test "Reset primary controller with snat" failes for MOS 8.0

[Alexander Gromov]

Repository: https://github.com/Mirantis/mos-integration-tests

Test "Reset primary controller with snat" for MOS 8.0 fails with the following message:
    TimeoutExpired: Timeout of 180 seconds expired waiting for SSH command: ping -c1 8.8.8.8 completed with 0 exit code

Testrail links:
https://mirantis.testrail.com/index.php?/tests/view/5596578
https://mirantis.testrail.com/index.php?/tests/view/5653131

Environment: 3 controllers + 2 computes-cinder VxLAN + L2POP + DVR or VLAN + DVR

Milestone: Mirantis OpenStack 8.0-updates

[Alexander Gromov (agromov)]

Review link for stable/8.0 branch:
https://review.gerrithub.io/#/c/276607

[Alexander Gromov (agromov)]

Test continues to fail.

Now we have got the following error:
TimeoutExpired: Timeout of 180 seconds expired waiting for snat is rescheduled

https://mirantis.testrail.com/index.php?/tests/view/5991980&group_by=cases:section_id&group_order=asc&group_id=16916
https://mirantis.testrail.com/index.php?/tests/view/5961723&group_by=cases:section_id&group_order=asc&group_id=16916