Comment 6 for bug 1636561

Reproduced on 9.2 snapshot #684:
https://product-ci.infra.mirantis.net/job/9.x.system_test.ubuntu.ha_neutron_destructive/162/testReport/(root)/ha_corosync_stability_check/ha_corosync_stability_check/

 Scenario:
        1. On the first controller kill corosync
        2. Verify for all controllers "pcs status nodes" reports
        3. Start corosync on the first controller
        4. Repeat steps 1-3 500 times