<!--- 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

```

pg_obj = find_dvspg_by_name(dvs_obj, network_name)
                    if pg_obj is None:
                        self.module.fail_json(msg="Unable to find distributed port group %s" % network_name)
                else:
                    pg_obj = self.cache.find_obj(self.content, [vim.dvs.DistributedVirtualPortgroup], network_name)
                
                
                if not pg_obj.config.distributedVirtualSwitch:
                    self.module.fail_json(msg="Failed to find distributed virtual switch which is associated with"
                                              " distributed virtual portgroup '%s'. Make sure hostsystem is associated with"
                                              " the given distributed virtual portgroup. Also, check if user has correct"
                                              " permission to access distributed virtual switch in the given portgroup." % pg_obj.name)
                if (nic.device.backing and
                    (not hasattr(nic.device.backing, 'port') or
                     (nic.device.backing.port.portgroupKey != pg_obj.key or
                      nic.device.backing.port.switchUuid != pg_obj.config.distributedVirtualSwitch.uuid))):
                    nic_change_detected = True
                dvs_port_connection = vim.dvs.PortConnection()
                dvs_port_connection.portgroupKey = pg_obj.key
                
                
                
                host_system = self.params.get('esxi_hostname')
                if host_system and host_system not in [host.config.host.name for host in pg_obj.config.distributedVirtualSwitch.config.host]:
                    self.module.fail_json(msg="It seems that host system '%s' is not associated with distributed"
                                              " virtual portgroup '%s'. Please make sure host system is associated"
                                              " with given distributed virtual portgroup" % (host_system, pg_obj.name))
                dvs_port_connection.switchUuid = pg_obj.config.distributedVirtualSwitch.uuid
                nic.device.backing = vim.vm.device.VirtualEthernetCard.DistributedVirtualPortBackingInfo()
                nic.device.backing.port = dvs_port_connection