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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.

argument_spec.update(
        name=dict(type='str'),
        uuid=dict(type='str'),
        moid=dict(type='str'),
        folder=dict(type='str'),
        datacenter=dict(type='str', default='ha-datacenter'),
        esxi_hostname=dict(type='str'),
        cluster=dict(type='str'),
        gather_network_info=dict(type='bool', default=False, aliases=['gather_network_facts']),
        networks=dict(type='list', default=[])
    )
    module = AnsibleModule(
        argument_spec=argument_spec,
        required_one_of=[
            ['name', 'uuid', 'moid']
        ]
    )
    pyv = PyVmomiHelper(module)
    vm = pyv.get_vm()
    if not vm:
        vm_id = (module.params.get('uuid') or module.params.get('name') or module.params.get('moid'))
        module.fail_json(msg='Unable to find the specified virtual machine using %s' % vm_id)
    result = pyv.reconfigure_vm_network(vm)
    if result['failed']:
        module.fail_json(**result)
    else:
        module.exit_json(**result)
if __name__ == '__main__':
    main()