Comment 0 for bug 1610157

Reproduced on CI: https://patching-ci.infra.mirantis.net/job/8.0.acceptance.ubuntu.ha_scale_group_2/8/testReport/(root)/remove_controllers/remove_controllers/

Steps to reproduce:
1. Create cluster
2. Add 3 controller, 1 compute
3. Deploy the cluster
4. Remove 2 controllers
5. Deploy changes
6. Check /etc/hosts that removed nodes aren't present

Expected results:
Information about removed controllers must be deleted on other controllers in /etc/hosts file

Actual results:
/etc/hosts file on non removed controller contain information about removed controllers

Place in test:
https://github.com/openstack/fuel-qa/blob/stable/8.0/fuelweb_test/tests/tests_scale/test_scale_group_2.py#L174

Reproducibility: 100%