##### 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`
def __init__(self, module):
        super(VmwareDatastoreMaintenanceMgr, self).__init__(module)
        datastore_name = self.params.get('datastore')
        cluster_name = self.params.get('cluster_name')
        datastore_cluster = self.params.get('datastore_cluster')
        self.datastore_objs = []
        if datastore_name:
            ds = self.find_datastore_by_name(datastore_name=datastore_name)
            if not ds:
                self.module.fail_json(msg='Failed to find datastore "%(datastore)s".' % self.params)
            self.datastore_objs = [ds]
        elif cluster_name:
            cluster = find_cluster_by_name(self.content, cluster_name)
            if not cluster:
                self.module.fail_json(msg='Failed to find cluster "%(cluster_name)s".' % self.params)
            self.datastore_objs = cluster.datastore
        elif datastore_cluster:
            datastore_cluster_obj = get_all_objs(self.content, [vim.StoragePod])
            if not datastore_cluster_obj:
                self.module.fail_json(msg='Failed to find datastore cluster "%(datastore_cluster)s".' % self.params)
            for datastore in datastore_cluster_obj.childEntity:
                self.datastore_objs.append(datastore)
        else:
            self.module.fail_json(msg="Please select one of 'cluster_name', 'datastore' or 'datastore_cluster'.")
        self.state = self.params.get('state')
    def ensure(self):