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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"
    ...
```

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

##### 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
```

) if self.param('cpu_pinning') else None,
                mode=otypes.CpuMode(self.param('cpu_mode')) if self.param('cpu_mode') else None,
            ) if any((
                self.param('cpu_cores'),
                self.param('cpu_sockets'),
                self.param('cpu_threads'),
                self.param('cpu_mode'),
                self.param('cpu_pinning')
            )) else None,
            cpu_shares=self.param('cpu_shares'),
            os=otypes.OperatingSystem(
                type=self.param('operating_system'),
                boot=otypes.Boot(
                    devices=[
                        otypes.BootDevice(dev) for dev in self.param('boot_devices')
                    ],
                ) if self.param('boot_devices') else None,
                cmdline=self.param('kernel_params') if self.param('kernel_params_persist') else None,
                initrd=self.param('initrd_path') if self.param('kernel_params_persist') else None,
                kernel=self.param('kernel_path') if self.param('kernel_params_persist') else None,
            ) if (
                self.param('operating_system') or self.param('boot_devices') or self.param('kernel_params_persist')
            ) else None,
            type=otypes.VmType(
                self.param('type')
            ) if self.param('type') else None,
            memory=convert_to_bytes(
                self.param('memory')
            ) if self.param('memory') else None,
            memory_policy=otypes.MemoryPolicy(