##### SUMMARY
The vmware_vm_inventory plugin cannot verify the inventory file when being loaded via the auto plugin

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
lib/ansible/plugins/inventory/vmware_vm_inventory.py

##### ANSIBLE VERSION
```paste below
ansible 2.8.1
  config file = None
  configured module search path = ['/Users/wtome/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/Cellar/ansible/2.8.1_1/libexec/lib/python3.7/site-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 3.7.4 (default, Sep  7 2019, 18:27:02) [Clang 10.0.1 (clang-1001.0.46.4)]
```

##### CONFIGURATION
```paste below

```

##### OS / ENVIRONMENT
MacOS 10.14.6


##### STEPS TO REPRODUCE
vmware_vm_inventory.yaml
```yaml
---
plugin: vmware_vm_inventory
strict: True
```

##### EXPECTED RESULTS
Inventory should be parsed from vCenter

##### ACTUAL RESULTS
```paste below
ansible-inventory -i vmware_vm_inventory.yaml --playbook-dir=. --list
 [WARNING]:  * Failed to parse /Users/wtome/ansible-
inventory/tests/vmware_vm_inventory.yaml with auto plugin: inventory config
'/Users/wtome/ansible-
inventory/tests/vmware_vm_inventory.yaml' could not be verified by plugin
'vmware_vm_inventory'
```

if tag_obj.name not in cacheable_results:
                    cacheable_results[tag_obj.name] = {'hosts': []}
                    self.inventory.add_group(tag_obj.name)
        for vm_obj in objects:
            for vm_obj_property in vm_obj.propSet:
                
                
                
                if not vm_obj.obj.config:
                    
                    continue
                current_host = vm_obj_property.val + "_" + vm_obj.obj.config.uuid
                if current_host not in hostvars:
                    hostvars[current_host] = {}
                    self.inventory.add_host(current_host)
                    host_ip = vm_obj.obj.guest.ipAddress
                    if host_ip:
                        self.inventory.set_variable(current_host, 'ansible_host', host_ip)
                    self._populate_host_properties(vm_obj, current_host)
                    
                    if HAS_VSPHERE and self.pyv.with_tags:
                        
                        vm_mo_id = vm_obj.obj._GetMoId()
                        vm_dynamic_id = DynamicID(type='VirtualMachine', id=vm_mo_id)
                        attached_tags = tag_association.list_attached_tags(vm_dynamic_id)
                        for tag_id in attached_tags:
                            self.inventory.add_child(tags_info[tag_id], current_host)
                            cacheable_results[tags_info[tag_id]]['hosts'].append(current_host)
                    
                    vm_power = str(vm_obj.obj.summary.runtime.powerState)