<!--- 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

```

self.change_detected = True
            
            elif vm_creation and not self.params['template']:
                self.module.fail_json(msg="hardware.num_cpus attribute is mandatory for VM creation")
            if 'memory_mb' in self.params['hardware']:
                try:
                    memory_mb = int(self.params['hardware']['memory_mb'])
                except ValueError:
                    self.module.fail_json(msg="Failed to parse hardware.memory_mb value."
                                              " Please refer the documentation and provide"
                                              " correct value.")
                
                if vm_obj and vm_obj.runtime.powerState == vim.VirtualMachinePowerState.poweredOn:
                    if vm_obj.config.memoryHotAddEnabled and memory_mb < vm_obj.config.hardware.memoryMB:
                        self.module.fail_json(msg="Configured memory is less than memory size of the VM, "
                                                  "operation is not supported")
                    elif not vm_obj.config.memoryHotAddEnabled and memory_mb != vm_obj.config.hardware.memoryMB:
                        self.module.fail_json(msg="memoryHotAdd is not enabled")
                self.configspec.memoryMB = memory_mb
                if vm_obj is None or self.configspec.memoryMB != vm_obj.config.hardware.memoryMB:
                    self.change_detected = True
            
            elif vm_creation and not self.params['template']:
                self.module.fail_json(msg="hardware.memory_mb attribute is mandatory for VM creation")
            if 'hotadd_memory' in self.params['hardware']:
                if vm_obj and vm_obj.runtime.powerState == vim.VirtualMachinePowerState.poweredOn and \
                        vm_obj.config.memoryHotAddEnabled != bool(self.params['hardware']['hotadd_memory']):
                    self.module.fail_json(msg="Configure hotadd memory operation is not supported when VM is power on")
                self.configspec.memoryHotAddEnabled = bool(self.params['hardware']['hotadd_memory'])
                if vm_obj is None or self.configspec.memoryHotAddEnabled != vm_obj.config.memoryHotAddEnabled: