<!--- 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

```

if host not in self.esx_hosts:
            self.esx_hosts[host] = self.find_obj(self.content, [vim.HostSystem], host)
        return self.esx_hosts[host]
    def get_parent_datacenter(self, obj):
        """ Walk the parent tree to find the objects datacenter """
        if isinstance(obj, vim.Datacenter):
            return obj
        if obj in self.parent_datacenters:
            return self.parent_datacenters[obj]
        datacenter = None
        while True:
            if not hasattr(obj, 'parent'):
                break
            obj = obj.parent
            if isinstance(obj, vim.Datacenter):
                datacenter = obj
                break
        self.parent_datacenters[obj] = datacenter
        return datacenter
class PyVmomiHelper(PyVmomi):
    def __init__(self, module):
        super(PyVmomiHelper, self).__init__(module)
        self.device_helper = PyVmomiDeviceHelper(self.module)
        self.configspec = None
        self.relospec = None
        self.change_detected = False  
        self.change_applied = False   
        self.customspec = None
        self.cache = PyVmomiCache(self.content, dc_name=self.params['datacenter'])
    def gather_facts(self, vm):