<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Currently it's not possible to specify disks to be included in the snapshot, always all disks are used.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ovirt_snapshot

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->

<!--- Paste example playbooks or commands between quotes below -->
Could look like:
```yaml
ovirt_snapshot:
  description: My snap
  vm_name: myvm
  disks:
    - id: 123
    - id: 456
```

or 

```yaml
ovirt_snapshot:
  description: My snap
  vm_name: myvm
  disks:
    - name: myvm_disk_db
    - name: myvm_disk_store
```

<!--- HINT: You can also paste gist.github.com links for larger files -->

otypes.ImageTransfer(
            image=otypes.Image(
                id=module.params['disk_id'],
            ),
            direction=direction,
        )
    )
    transfer_service = transfers_service.image_transfer_service(transfer.id)
    try:
        
        
        while transfer.phase == otypes.ImageTransferPhase.INITIALIZING:
            time.sleep(module.params['poll_interval'])
            transfer = transfer_service.get()
        proxy_url = urlparse(transfer.proxy_url)
        context = ssl.create_default_context()
        auth = module.params['auth']
        if auth.get('insecure'):
            context.check_hostname = False
            context.verify_mode = ssl.CERT_NONE
        elif auth.get('ca_file'):
            context.load_verify_locations(cafile=auth.get('ca_file'))
        proxy_connection = HTTPSConnection(
            proxy_url.hostname,
            proxy_url.port,
            context=context,
        )
        transfer_func(
            transfer_service,
            proxy_connection,