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##### 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

```

- Name of the virtual machine to export.
    - This is a required parameter, if parameter C(uuid) or C(moid) is not supplied.
    type: str
  uuid:
    description:
    - Uuid of the virtual machine to export.
    - This is a required parameter, if parameter C(name) or C(moid) is not supplied.
    type: str
  moid:
    description:
    - Managed Object ID of the instance to manage if known, this is a unique identifier only within a single vCenter instance.
    - This is required if C(name) or C(uuid) is not supplied.
    version_added: '2.9'
    type: str
  datacenter:
    default: ha-datacenter
    description:
    - Datacenter name of the virtual machine to export.
    - This parameter is case sensitive.
    type: str
  folder:
    description:
    - Destination folder, absolute path to find the specified guest.
    - The folder should include the datacenter. ESX's datacenter is ha-datacenter.
    - This parameter is case sensitive.
    - 'If multiple machines are found with same name, this parameter is used to identify
       uniqueness of the virtual machine. version_added 2.5'
    - 'Examples:'
    - '   folder: /ha-datacenter/vm'
    - '   folder: ha-datacenter/vm'