<!--- 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

```

property_info.value = property_spec.get('value', '')
                property_info.description = property_spec.get('description')
                new_vapp_property_spec.info = property_info
                new_vapp_property_spec.info.key = new_property_index
                new_property_index += 1
                is_property_changed = True
                if is_property_changed:
                    new_vmconfig_spec.property.append(new_vapp_property_spec)
        if new_vmconfig_spec.property:
            self.configspec.vAppConfig = new_vmconfig_spec
            self.change_detected = True
    def customize_customvalues(self, vm_obj):
        if len(self.params['customvalues']) == 0:
            return
        facts = self.gather_facts(vm_obj)
        for kv in self.params['customvalues']:
            if 'key' not in kv or 'value' not in kv:
                self.module.exit_json(msg="customvalues items required both 'key' and 'value' fields.")
            key_id = None
            for field in self.content.customFieldsManager.field:
                if field.name == kv['key']:
                    key_id = field.key
                    break
            if not key_id:
                self.module.fail_json(msg="Unable to find custom value key %s" % kv['key'])
            
            if kv['key'] not in facts['customvalues'] or facts['customvalues'][kv['key']] != kv['value']:
                self.content.customFieldsManager.SetField(entity=vm_obj, key=key_id, value=kv['value'])
                self.change_detected = True
    def customize_vm(self, vm_obj):