##### 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`
"""Class to manage configured NTP servers"""
    def __init__(self, module):
        super(VmwareNtpConfigManager, self).__init__(module)
        cluster_name = self.params.get('cluster_name', None)
        esxi_host_name = self.params.get('esxi_hostname', None)
        self.ntp_servers = self.params.get('ntp_servers', list())
        self.hosts = self.get_all_host_objs(cluster_name=cluster_name, esxi_host_name=esxi_host_name)
        if not self.hosts:
            self.module.fail_json(msg="Failed to find host system.")
        self.results = {}
        self.desired_state = self.params.get('state', None)
        self.verbose = module.params.get('verbose', False)
    def update_ntp_servers(self, host, ntp_servers_configured, ntp_servers_to_change, operation='overwrite'):
        """Update NTP server configuration"""
        host_date_time_manager = host.configManager.dateTimeSystem
        if host_date_time_manager:
            
            if operation == 'overwrite':
                new_ntp_servers = list(ntp_servers_to_change)
            else:
                new_ntp_servers = list(ntp_servers_configured)