##### 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'
```

""" Check all requirements for this inventory are satisified"""
        if not HAS_REQUESTS:
            raise AnsibleParserError('Please install "requests" Python module as this is required'
                                     ' for VMware Guest dynamic inventory plugin.')
        elif not HAS_PYVMOMI:
            raise AnsibleParserError('Please install "PyVmomi" Python module as this is required'
                                     ' for VMware Guest dynamic inventory plugin.')
        if HAS_REQUESTS:
            
            
            required_version = (2, 3)
            requests_version = requests.__version__.split(".")[:2]
            try:
                requests_major_minor = tuple(map(int, requests_version))
            except ValueError:
                raise AnsibleParserError("Failed to parse 'requests' library version.")
            if requests_major_minor < required_version:
                raise AnsibleParserError("'requests' library version should"
                                         " be >= %s, found: %s." % (".".join([str(w) for w in required_version]),
                                                                    requests.__version__))
        if not HAS_VSPHERE and self.with_tags:
            raise AnsibleError("Unable to find 'vSphere Automation SDK' Python library which is required."
                               " Please refer this URL for installation steps"
                               " - https://code.vmware.com/web/sdk/65/vsphere-automation-python")
        if not all([self.hostname, self.username, self.password]):
            raise AnsibleError("Missing one of the following : hostname, username, password. Please read "
                               "the documentation for more information.")
    def _get_managed_objects_properties(self, vim_type, properties=None):