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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
```

placement_policy=otypes.VmPlacementPolicy(
                affinity=otypes.VmAffinity(self.param('placement_policy')),
                hosts=[
                    otypes.Host(name=self.param('host')),
                ] if self.param('host') else None,
            ) if self.param('placement_policy') else None,
            soundcard_enabled=self.param('soundcard_enabled'),
            display=otypes.Display(
                smartcard_enabled=self.param('smartcard_enabled')
            ) if self.param('smartcard_enabled') is not None else None,
            io=otypes.Io(
                threads=self.param('io_threads'),
            ) if self.param('io_threads') is not None else None,
            numa_tune_mode=otypes.NumaTuneMode(
                self.param('numa_tune_mode')
            ) if self.param('numa_tune_mode') else None,
            rng_device=otypes.RngDevice(
                source=otypes.RngSource(self.param('rng_device')),
            ) if self.param('rng_device') else None,
            custom_properties=[
                otypes.CustomProperty(
                    name=cp.get('name'),
                    regexp=cp.get('regexp'),
                    value=str(cp.get('value')),
                ) for cp in self.param('custom_properties') if cp
            ] if self.param('custom_properties') is not None else None,
            initialization=self.get_initialization() if self.param('cloud_init_persist') else None,
            snapshots=[otypes.Snapshot(id=snapshot.id)] if snapshot is not None else None,
        )
    def _get_export_domain_service(self):