<!--- 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 -->
vmware_guest handles 'version' parameter type error. 
##### 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_guest
##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.10.0.dev0
  config file = None
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /root/ansible/lib/ansible
  executable location = /root/ansible/bin/ansible
  python version = 2.7.15+ (default, Oct  7 2019, 17:39:04) [GCC 7.4.0]
```

##### 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 -->
Using vmware_guest to deploy a new VM with 'version' parameter set to integer 14.
Return error 'int' object has no attribute 'lower'.
This is caused in line 1285:
"if temp_version.lower() == 'latest':"
<!--- 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 -->


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

<!--- Paste verbatim command output between quotes -->
```paste below

```

- ' - C(fullname) (string): Server owner name (default: Administrator).'
    - ' - C(joindomain) (string): AD domain to join (Not compatible with C(joinworkgroup)).'
    - ' - C(joinworkgroup) (string): Workgroup to join (Not compatible with C(joindomain), default: WORKGROUP).'
    - ' - C(orgname) (string): Organisation name (default: ACME).'
    - ' - C(password) (string): Local administrator password.'
    - ' - C(productid) (string): Product ID.'
    - ' - C(runonce) (list): List of commands to run at first user logon.'
    - ' - C(timezone) (int): Timezone (See U(https://msdn.microsoft.com/en-us/library/ms912391.aspx)).'
    version_added: '2.3'
  vapp_properties:
    description:
    - A list of vApp properties
    - 'For full list of attributes and types refer to: U(https://github.com/vmware/pyvmomi/blob/master/docs/vim/vApp/PropertyInfo.rst)'
    - 'Basic attributes are:'
    - ' - C(id) (string): Property id - required.'
    - ' - C(value) (string): Property value.'
    - ' - C(type) (string): Value type, string type by default.'
    - ' - C(operation): C(remove): This attribute is required only when removing properties.'
    version_added: '2.6'
  customization_spec:
    description:
    - Unique name identifying the requested customization specification.
    - This parameter is case sensitive.
    - If set, then overrides C(customization) parameter values.
    version_added: '2.6'
  datastore:
    description:
    - Specify datastore or datastore cluster to provision virtual machine.
    - 'This parameter takes precedence over "disk.datastore" parameter.'
    - 'This parameter can be used to override datastore or datastore cluster setting of the virtual machine when deployed