Description of problem:
Uploading one image into two different datacenters will fail:
  vars:
    qcow_url: http://server.com/image.qcow2
    template_cluster: 
    template_name: pkubica-rhevm30-rhel62
    template_memory: 4GiB
    template_cpu: 4
    template_disk_size: 50GiB

  roles:
    - role: oVirt.image-template
      template_cluster: cluster_in_datacenter1
      template_disk_storage: storage_in_datacenter1
    - role: oVirt.image-template
      template_cluster: cluster_in_datacenter2
      template_disk_stroage: storage_in_datacenter2

Separate into two different plays will work but template_name must be different to each datacenter.

when image doesn't exist in engine:
TASK [oVirt.image-template : Fetch storages] **********************
task path: /home/pkubica/.ansible/roles/oVirt.image-template/tasks/qcow2_image.yml:42
...
The full traceback is:
Traceback (most recent call last):
  File "/tmp/ansible_6Xuc6e/ansible_module_ovirt_storage_domains_facts.py", line 87, in main
    connection = create_connection(auth)
  File "/tmp/ansible_6Xuc6e/ansible_modlib.zip/ansible/module_utils/ovirt.py", line 146, in create_connection
    headers=auth.get('headers', None),
  File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 303, in __init__
    raise Error('The \'url\' parameter is mandatory')
Error: The 'url' parameter is mandatory

fatal: [engine.example.com]: FAILED! => {
    "changed": false, 
    "invocation": {
        "module_args": {
            "fetch_nested": false, 
            "nested_attributes": [], 
            "pattern": ""
        }
    }, 
    "msg": "The 'url' parameter is mandatory"
}

when image exist in engine:
same traceback but in task:
TASK [oVirt.image-template : Check if template already exists]

Version-Release number of selected component (if applicable):
ansible-2.5.1-1.el7.noarch
oVirt.image-template (1.1.6)

How reproducible:
always

Steps to Reproduce:
see description

Actual results:
User must separate roles into plays but using variable with role should work.
Also specify only qcow_url and template_name to upload multiple images should also work