##### SUMMARY
The following modules throw a `[WARNING]: Found internal 'results' key in module return, renamed to 'ansible_module_results'`:

* [ ]  `vmware_datastore_maintenancemode`
* [ ]  `vmware_host_kernel_manager`
* [ ]  `vmware_host_ntp`
* [ ]  `vmware_host_service_manager`
* [ ]  `vmware_tag`

I've generated the list like this:

`cd lib/ansible/modules/cloud/vmware/ && grep exit_json *.py | grep results= | cut -d ':' -f 1 | cut -d '.' -f 1`

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
vmware

##### ANSIBLE VERSION
`devel`
"""Return different entries of two lists"""
        return [a for a in list1 + list2 if (a not in list1) or (a not in list2)]
def main():
    """Main"""
    argument_spec = vmware_argument_spec()
    argument_spec.update(
        cluster_name=dict(type='str', required=False),
        esxi_hostname=dict(type='str', required=False),
        ntp_servers=dict(type='list', required=True),
        state=dict(type='str', choices=['absent', 'present']),
        verbose=dict(type='bool', default=False, required=False)
    )
    module = AnsibleModule(
        argument_spec=argument_spec,
        required_one_of=[
            ['cluster_name', 'esxi_hostname'],
        ],
        supports_check_mode=True
    )
    vmware_host_ntp_config = VmwareNtpConfigManager(module)
    vmware_host_ntp_config.check_host_state()
if __name__ == "__main__":
    main()