Description of problem:
This was brought to my attention when an automated test verifying sanity of oVirt.image-template role began to fail. I dug a little deeper and found out that it fails during task "Deploy the qcow image to oVirt engine" that uses ovirt_vm module. This module, even when called separately, fails with this message:

fatal: [localhost]: FAILED! => {"changed": false, "msg": "Fault reason is \"Operation Failed\". Fault detail is \"[General command validation failure.]\". HTTP response code is 500."

Version-Release number of selected component (if applicable):
rhvm-4.4.0-0.20.master.el7.noarch
ansible-2.9.4-1.el7ae.noarch

How reproducible:
100 %


Steps to Reproduce:
1. Have a QCOW2 image ready at your local machine
2. Prepare a playbook similar to this one:

- hosts: localhost
  gather_facts: false
  tasks:
    - ovirt_auth:
        url: https://<my_engine>/ovirt-engine/api
        username: admin@internal
        password: <my_password>
        insecure: yes

    - ovirt_disk:
        auth: "{{ ovirt_auth }}"
        name: "jzmeskal"
        size: "4GiB"
        upload_image_path: "/tmp/Fedora-Cloud-Base-Rawhide-20200211.n.0.x86_64.qcow2"
        storage_domain: "jzmeskal_engine_1"


3. Run ansible-playbook /path/to/your/playbook.yaml

Actual results:
http://pastebin.test.redhat.com/835929

Expected results:
I don't see any reason why this shouldn't upload the image successfully.

Additional info:
I verified I was able to upload the image via webadmin.