<!--- 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

```

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##### 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

```

"""
        Adds vmdk file described by expected_disk_spec['filename'], retrieves the file
        information and adds the correct spec to self.configspec.deviceChange.
        """
        filename = expected_disk_spec['filename']
        
        if (vm_obj and diskspec.device.backing.fileName != filename) or vm_obj is None:
            vmdk_file = self.find_vmdk(expected_disk_spec['filename'])
            diskspec.device.backing.fileName = expected_disk_spec['filename']
            diskspec.device.capacityInKB = VmomiSupport.vmodlTypes['long'](vmdk_file.fileSize / 1024)
            diskspec.device.key = -1
            self.change_detected = True
            self.configspec.deviceChange.append(diskspec)
    def configure_disks(self, vm_obj):
        
        if len(self.params['disk']) == 0:
            return
        scsi_ctl = self.get_vm_scsi_controller(vm_obj)
        
        if vm_obj is None or scsi_ctl is None:
            scsi_ctl = self.device_helper.create_scsi_controller(self.get_scsi_type())
            self.change_detected = True
            self.configspec.deviceChange.append(scsi_ctl)
        disks = [x for x in vm_obj.config.hardware.device if isinstance(x, vim.vm.device.VirtualDisk)] \
            if vm_obj is not None else None
        if disks is not None and self.params.get('disk') and len(self.params.get('disk')) < len(disks):
            self.module.fail_json(msg="Provided disks configuration has less disks than "
                                      "the target object (%d vs %d)" % (len(self.params.get('disk')), len(disks)))