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##### SUMMARY
<!--- Explain the problem briefly below -->
Since commit df581eb ovirt_vm is unable to find a template shared among multiple clusters in the same datacenter. Moreover, the document says that `cluster` parameter is a parameter used to define where VMs will be created. Then it should not be used to filter a template search which is not related to VM storage.

##### ISSUE TYPE
- Bug Report

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

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
2.8.2
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
In RHEVM:
1. Create a cluster `cluster_a` and add a template `template_a` in this cluster
2. Create a cluster `cluster_b`

<!--- Paste example playbooks or commands between quotes below -->
```yaml

- name: Provision machine
  ovirt_vm:
    ...
    cluster: "cluster_b"
    template: "template_a"
    ...
```

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##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
The template should be found (Behaviour before commit df581eb)

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
It raises an error

<!--- Paste verbatim command output between quotes -->
```paste below
Template with name 'template_a' and version 'None' in cluster 'cluster_b' was not found
```

template = self.__get_template_with_version()
        cluster = self.__get_cluster()
        snapshot = self.__get_snapshot()
        disk_attachments = self.__get_storage_domain_and_all_template_disks(template)
        return otypes.Vm(
            id=self.param('id'),
            name=self.param('name'),
            cluster=otypes.Cluster(
                name=cluster
            ) if cluster else None,
            disk_attachments=disk_attachments,
            template=otypes.Template(
                id=template.id,
            ) if template else None,
            use_latest_template_version=self.param('use_latest_template_version'),
            stateless=self.param('stateless') or self.param('use_latest_template_version'),
            delete_protected=self.param('delete_protected'),
            bios=(
                otypes.Bios(boot_menu=otypes.BootMenu(enabled=self.param('boot_menu')))
            ) if self.param('boot_menu') is not None else None,
            console=(
                otypes.Console(enabled=self.param('serial_console'))
            ) if self.param('serial_console') is not None else None,
            usb=(
                otypes.Usb(enabled=self.param('usb_support'))
            ) if self.param('usb_support') is not None else None,
            sso=(
                otypes.Sso(