<!--- 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

```

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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

```

self.module.fail_json(msg="Failed to parse disk size please review value"
                                              " provided using documentation.")
            else:
                param = [x for x in expected_disk_spec.keys() if x.startswith('size_')][0]
                unit = param.split('_')[-1].lower()
                expected = [x[1] for x in expected_disk_spec.items() if x[0].startswith('size_')][0]
                expected = int(expected)
            disk_units = dict(tb=3, gb=2, mb=1, kb=0)
            if unit in disk_units:
                unit = unit.lower()
                return expected * (1024 ** disk_units[unit])
            else:
                self.module.fail_json(msg="%s is not a supported unit for disk size."
                                          " Supported units are ['%s']." % (unit,
                                                                            "', '".join(disk_units.keys())))
        
        self.module.fail_json(
            msg="No size, size_kb, size_mb, size_gb or size_tb attribute found into disk configuration")
    def find_vmdk(self, vmdk_path):
        """
        Takes a vsphere datastore path in the format
            [datastore_name] path/to/file.vmdk
        Returns vsphere file object or raises RuntimeError
        """
        datastore_name, vmdk_fullpath, vmdk_filename, vmdk_folder = self.vmdk_disk_path_split(vmdk_path)
        datastore = self.cache.find_obj(self.content, [vim.Datastore], datastore_name)
        if datastore is None:
            self.module.fail_json(msg="Failed to find the datastore %s" % datastore_name)
        return self.find_vmdk_file(datastore, vmdk_fullpath, vmdk_filename, vmdk_folder)
    def add_existing_vmdk(self, vm_obj, expected_disk_spec, diskspec, scsi_ctl):