Login with ssh key fails

Found a situation where bluval script login with ssh key fails in every case, even when the exact same login works otherwise (without running bluval script) from outside and inside the container.

Error message:

Login with public key failed for user 'root'.

Necessary workaround: needed to modify robot file that is used for the login (such as cyclictest.robot) by commenting line:

# Login With Public Key ${USERNAME} ${HOME}/.ssh/id_rsa

and appending line:

LOGIN ${USERNAME} ${PASSWORD}

and also appending password into the variables.yaml file, forcing password login instead of ssh key login.