<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Explain the problem briefly below -->
If target VM has big disk file, exporting to ovf will timeout in 10 minutes. 
"timeout" can be set as a module parameter to let user set the timeout value for different scenarios.
##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
vmware_export_ovf
##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.8.1
  config file = /root/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.15rc1 (default, Nov 12 2018, 14:31:15) [GCC 7.3.0]
```

##### 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

```

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

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
VM can be exported.

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
Timeout occurred.
<!--- Paste verbatim command output between quotes -->
```paste below

```

vm_descriptor_result = ovf_manager.CreateDescriptor(obj=vm_obj, cdp=ovf_parameters)
            if vm_descriptor_result.error:
                http_nfc_lease.HttpNfcLeaseAbort()
                lease_updater.stop()
                self.module.fail_json(msg='Create VM descriptor file error %s.' % vm_descriptor_result.error)
            else:
                vm_descriptor = vm_descriptor_result.ovfDescriptor
                ovf_descriptor_path = os.path.join(self.ovf_dir, ovf_descriptor_name + '.ovf')
                sha256_hash = hashlib.sha256()
                with open(self.mf_file, 'a') as mf_handle:
                    with open(ovf_descriptor_path, 'wb') as handle:
                        handle.write(vm_descriptor)
                        sha256_hash.update(vm_descriptor)
                    mf_handle.write('SHA256(' + os.path.basename(ovf_descriptor_path) + ')= ' + sha256_hash.hexdigest() + '\n')
                http_nfc_lease.HttpNfcLeaseProgress(100)
                
                http_nfc_lease.HttpNfcLeaseComplete()
                lease_updater.stop()
                self.facts.update({'manifest': self.mf_file, 'ovf_file': ovf_descriptor_path})
        except Exception as err:
            kwargs = {
                'changed': False,
                'failed': True,
                'msg': to_text(err),
            }
            http_nfc_lease.HttpNfcLeaseAbort()
            lease_updater.stop()
            return kwargs
        return {'changed': True, 'failed': False, 'instance': self.facts}
def main():