Description of problem:
When running the hosted-engine setup using a non-interactive ssh session (as running from jenkins) it fails to run with the error:

current session does not belong to lago group.
[ INFO  ] Stage: Initializing
[ INFO  ] Generating a temporary VNC password.
[ INFO  ] Stage: Environment setup
          Configuration files: ['/root/hosted-engine-deploy-answers-file.conf']
          Log file: /var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20160531155420-932uqh.log
          Version: otopi-1.4.1 (otopi-1.4.1-1.el7.centos)
[ ERROR ] It has been detected that this program is executed through an SSH connection without pseudo-tty allocation. Please run again ssh adding -t option 
[WARNING] Aborted
[ INFO  ] Stage: Clean up
[ INFO  ] Generating answer file '/var/lib/ovirt-hosted-engine-setup/answers/answers-20160531155420.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ ERROR ] Hosted Engine deployment failed: this system is not reliable, please check the issue, fix and redeploy
          Log file is located at /var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20160531155420-932uqh.log
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I face this issue when trying to run the system tests with hosted engine:
    https://gerrit.ovirt.org/#/c/58272

Version-Release number of selected component (if applicable):
ovirt-hosted-engine-setup-1.3.7.0-1.el7.centos.noarch

How reproducible:
Run a non-interactive hosted engine setup session from a non-interactive ssh session.

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: