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##### SUMMARY
The documentation states the instance uuid is required for the uuid parameter but the hw product uuid is used instead. 

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
vmware_guest_network

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.0rc1.post0
  config file = None
  configured module search path = ['/home/pernst/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.6/site-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 3.6.8 (default, Aug  7 2019, 17:28:10) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
```

##### 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 -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml
- name: Configure virtual network cards
  vmware_guest_network:
    hostname: "{{ vsphere_host }}"
    username: "{{ vsphere_user }}"
    password: "{{ vsphere_pass }}"
    validate_certs: "{{ vsphere_validate_certs | default(true) }}"
    datacenter: "{{ vsphere_target_dc }}"
    uuid: "{{ vm_facts.instance.instance_uuid }}"
  register: vm_networks
  delegate_to: localhost
```

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

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->


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

<!--- Paste verbatim command output between quotes -->
```paste below
FAILED! => {"changed": false, "msg": "Unable to find the specified virtual machine using <UUID>
```

P.S.:  I suggest the same uuid handling as in vmware_guest with an additional use_instance_uuid parameter.

network_list = self.sanitize_network_params()
        
        if (self.params['gather_network_info'] is not None and self.params['gather_network_info']) or len(network_list) == 0:
            results = {'changed': False, 'failed': False, 'network_data': self.get_network_info(vm_obj)}
        
        else:
            self.get_network_config_spec(vm_obj, network_list)
            try:
                task = vm_obj.ReconfigVM_Task(spec=self.config_spec)
                wait_for_task(task)
            except vim.fault.InvalidDeviceSpec as e:
                self.module.fail_json(msg="Failed to configure network adapter on given virtual machine due to invalid"
                                          " device spec : %s" % to_native(e.msg),
                                      details="Please check ESXi server logs for more details.")
            except vim.fault.RestrictedVersion as e:
                self.module.fail_json(msg="Failed to reconfigure virtual machine due to"
                                          " product versioning restrictions: %s" % to_native(e.msg))
            if task.info.state == 'error':
                results = {'changed': self.change_detected, 'failed': True, 'msg': task.info.error.msg}
            else:
                network_info = self.get_network_info(vm_obj)
                results = {'changed': self.change_detected, 'failed': False, 'network_data': network_info}
        return results
def main():
    argument_spec = vmware_argument_spec()