<!--- 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

```

""" This class caches references to objects which are requested multiples times but not modified """
    def __init__(self, content, dc_name=None):
        self.content = content
        self.dc_name = dc_name
        self.networks = {}
        self.clusters = {}
        self.esx_hosts = {}
        self.parent_datacenters = {}
    def find_obj(self, content, types, name, confine_to_datacenter=True):
        """ Wrapper around find_obj to set datacenter context """
        result = find_obj(content, types, name)
        if result and confine_to_datacenter:
            if to_text(self.get_parent_datacenter(result).name) != to_text(self.dc_name):
                result = None
                objects = self.get_all_objs(content, types, confine_to_datacenter=True)
                for obj in objects:
                    if name is None or to_text(obj.name) == to_text(name):
                        return obj
        return result
    def get_all_objs(self, content, types, confine_to_datacenter=True):