Comment 1 for bug 1799391

This issue was happening due to known_hosts file not present on one of the nodes and an ansible task was trying to access the file and clean it.

This is not a real error and can be ignored.

The task is updated with ignore_errors set to true.

Pull Request is in those reviews

https://github.com/Juniper/contrail-multi-cloud/pull/461
https://github.com/Juniper/contrail-multi-cloud/pull/462