<!--- 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 -->

snapshot_service = snapshots_service.snapshot_service(module.params.get('snapshot_id'))
    snapshot_disks_service = snapshot_service.disks_service()
    disk_id = ''
    if module.params.get('disk_id'):
        disk_id = module.params.get('disk_id')
    elif module.params.get('disk_name'):
        disk_id = get_id_by_name(snapshot_disks_service, module.params.get('disk_name'))
    return disk_id
def remove_old_snapshosts(module, vm_service, snapshots_service):
    deleted_snapshots = []
    changed = False
    date_now = datetime.now()
    for snapshot in snapshots_service.list():
        if snapshot.vm is not None and snapshot.vm.name == module.params.get('vm_name'):
            diff = date_now - snapshot.date.replace(tzinfo=None)
            if diff.days >= module.params.get('keep_days_old'):
                snapshot = remove_snapshot(module, vm_service, snapshots_service, snapshot.id).get('snapshot')
                deleted_snapshots.append(snapshot)
                changed = True
    return dict(snapshots=deleted_snapshots, changed=changed)
def main():
    argument_spec = ovirt_full_argument_spec(
        state=dict(
            choices=['restore', 'present', 'absent'],
            default='present',
        ),