<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
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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

```

task = None
        
        network_changes = False
        for nw in self.params['networks']:
            for key in nw:
                
                if key not in ('device_type', 'mac', 'name', 'vlan', 'type', 'start_connected'):
                    network_changes = True
                    break
        if len(self.params['customization']) > 1 or network_changes or self.params.get('customization_spec'):
            self.customize_vm(vm_obj=self.current_vm_obj)
        try:
            task = self.current_vm_obj.CustomizeVM_Task(self.customspec)
        except vim.fault.CustomizationFault as e:
            self.module.fail_json(msg="Failed to customization virtual machine due to CustomizationFault: %s" % to_native(e.msg))
        except vim.fault.RuntimeFault as e:
            self.module.fail_json(msg="failed to customization virtual machine due to RuntimeFault: %s" % to_native(e.msg))
        except Exception as e:
            self.module.fail_json(msg="failed to customization virtual machine due to fault: %s" % to_native(e.msg))
        self.wait_for_task(task)
        if task.info.state == 'error':
            return {'changed': self.change_applied, 'failed': True, 'msg': task.info.error.msg, 'op': 'customize_exist'}
        if self.params['wait_for_customization']:
            set_vm_power_state(self.content, self.current_vm_obj, 'poweredon', force=False)
            is_customization_ok = self.wait_for_customization(self.current_vm_obj)
            if not is_customization_ok:
                return {'changed': self.change_applied, 'failed': True, 'op': 'wait_for_customize_exist'}
        return {'changed': self.change_applied, 'failed': False}
    def wait_for_task(self, task, poll_interval=1):