<!--- Verify first that your issue is not already reported on GitHub -->
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##### 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

```

argument_spec = vmware_argument_spec()
    argument_spec.update(
        state=dict(type='str', default='present',
                   choices=['absent', 'poweredoff', 'poweredon', 'present', 'rebootguest', 'restarted', 'shutdownguest', 'suspended']),
        template=dict(type='str', aliases=['template_src']),
        is_template=dict(type='bool', default=False),
        annotation=dict(type='str', aliases=['notes']),
        customvalues=dict(type='list', default=[]),
        name=dict(type='str'),
        name_match=dict(type='str', choices=['first', 'last'], default='first'),
        uuid=dict(type='str'),
        use_instance_uuid=dict(type='bool', default=False),
        folder=dict(type='str'),
        guest_id=dict(type='str'),
        disk=dict(type='list', default=[]),
        cdrom=dict(type=list_or_dict, default=[]),
        hardware=dict(type='dict', default={}),
        force=dict(type='bool', default=False),
        datacenter=dict(type='str', default='ha-datacenter'),
        esxi_hostname=dict(type='str'),
        cluster=dict(type='str'),
        wait_for_ip_address=dict(type='bool', default=False),
        wait_for_ip_address_timeout=dict(type='int', default=300),
        state_change_timeout=dict(type='int', default=0),
        snapshot_src=dict(type='str'),
        linked_clone=dict(type='bool', default=False),
        networks=dict(type='list', default=[]),
        resource_pool=dict(type='str'),
        customization=dict(type='dict', default={}, no_log=True),
        customization_spec=dict(type='str', default=None),