NM - ipv6 - keep route upon reapply

tests bugs:
* https://bugzilla.redhat.com/show_bug.cgi?id=2004212
* https://bugzilla.redhat.com/show_bug.cgi?id=2006408
* https://bugzilla.redhat.com/show_bug.cgi?id=2007264

The new tests are essetially Beniamino Galvani's reproducer
(https://bugzilla.redhat.com/show_bug.cgi?id=2004212#c3 )
in nmci-ish, first tests just route presence after reapply,
second test also tests address presence after timeout.
6 jobs for !852 with dj/v6-keep-routes-upon-reapply in 1 minute and 51 seconds
latest detached
Status Name Job ID Coverage
  Test
failed TestResults #14559214
manual

00:00:55

passed UnitTests #14558527

00:00:56

passed TestResults #14558528
manual

00:05:20

 
  External
failed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-test-upstream/1931/

failed https://jenkins-networkmanager.apps.ocp.ci.centos.org/job/NetworkManager-test-mr/745/

00:41:51

failed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-test-upstream/1931/

00:42:58

 
Name Stage Failure
failed
TestResults Test
https://jenkins-networkmanager.apps.ocp.ci.centos.org/job/NetworkManager-test-mr/745//artifact/report_NetworkManager-ci_Test0081_ipv6_prefix_delegation_internal.html
https://jenkins-networkmanager.apps.ocp.ci.centos.org/job/NetworkManager-test-mr/745//artifact/report_NetworkManager-ci_Test0083_ipv6_dhcp_iaid_unset.html
https://jenkins-networkmanager.apps.ocp.ci.centos.org/job/NetworkManager-test-mr/745//artifact/report_NetworkManager-ci_Test0086_ra_timeout.html
https://jenkins-networkmanager.apps.ocp.ci.centos.org/job/NetworkManager-test-mr/745//artifact/report_NetworkManager-ci_Test0088_dhcpv6_hostname.html
Uploading artifacts for failed job
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=14559214 responseStatus=201 Created token=-WxAYDu6
Cleaning up file based variables
ERROR: Job failed: exit code 1