ovirt-engine has been using python-cheetah for handling the templates used within the project.

python-cheetah didn't receive updates since 2012 and is not available on RHEL 7.2.

Since we're dropping el6 support in 4.0 we are migrating to a template engine available in el7: python-jinja2[1] which is
available in 7.2 and still actively developed.

A patch has been pushed and is currently under review[2].

Please be sure to havepython-jinja2 installed on your EL7 development system.

Thanks,

[1] http://jinja.pocoo.org/

[2] https://gerrit.ovirt.org/52885