<!--- 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

```

argument_spec = vmware_argument_spec()
    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'),
        export_dir=dict(type='str'),
        export_with_images=dict(type='bool', default=False),
    )
    module = AnsibleModule(argument_spec=argument_spec,
                           supports_check_mode=True,
                           required_one_of=[
                               ['name', 'uuid', 'moid'],
                           ],
                           )
    pyv = VMwareExportVmOvf(module)
    vm = pyv.get_vm()
    if vm:
        vm_facts = pyv.gather_facts(vm)
        vm_power_state = vm_facts['hw_power_status'].lower()
        if vm_power_state != 'poweredoff':
            module.fail_json(msg='VM state should be poweredoff to export')
        results = pyv.export_to_ovf_files(vm_obj=vm)
    else:
        module.fail_json(msg='The specified virtual machine not found')
    module.exit_json(**results)
if __name__ == '__main__':
    main()