Description of problem:
Since virt-who can't support "exclude_host_parents" and "filter_host_parents" When virt-who run at rhevm/hyperV mode, it hasn't shown any remind info in the virt-who log when virt-who run with these two configures in these two modes.

Version-Release number of selected component (if applicable):
virt-who-0.14-4.el7.noarch
subscription-manager-1.15.9-6.el7.x86_64
python-rhsm-1.15.4-2.el7.x86_64
Satellite6.1.0-20150818.1

How reproducible:
Always

Steps to Reproduce:
1. Register system to Satellite
2. Configure virt-who run with filter_host_parents= in rhevm mode.
# cat /etc/virt-who.d/virt
[test-rhevm1]
type=rhevm
server=https://10.66.79.83:443
username=admin@internal
password=redhat
owner=ACME_Corporation
env=Library
filter_host_parents=
3. Restart virt-who service and check virt-who's log
2015-08-27 15:42:09,803 [DEBUG]  @virtwho.py:126 - Using config named 'test-rhevm1'
2015-08-27 15:42:09,804 [INFO]  @virtwho.py:661 - Using configuration "test-rhevm1" ("rhevm" mode)
2015-08-27 15:42:09,804 [DEBUG]  @virtwho.py:209 - Starting infinite loop with 10 seconds interval
2015-08-27 15:42:10,022 [DEBUG]  @subscriptionmanager.py:112 - Authenticating with certificate: /etc/pki/consumer/cert.pem
2015-08-27 15:42:13,475 [DEBUG]  @subscriptionmanager.py:146 - Checking if server has capability 'hypervisor_async'
2015-08-27 15:42:16,118 [DEBUG]  @subscriptionmanager.py:158 - Server does not have 'hypervisors_async' capability
2015-08-27 15:42:16,118 [INFO]  @subscriptionmanager.py:165 - Sending update in hosts-to-guests mapping: {
    "88d979a3-34f8-4cca-84e8-df0988257ba6": [], 
    "2c014415-c274-40f4-8265-b99c83d3e1aa": [
        {
            "guestId": "a78c947a-b73a-4a95-af96-031b2ba23756", 
            "state": 1, 
            "attributes": {
                "active": 1, 
                "virtWhoType": "rhevm", 
                "hypervisorType": "qemu"
            }
        }, 
    ]
}
2015-08-27 15:42:20,264 [DEBUG]  @subscriptionmanager.py:112 - Authenticating with certificate: /etc/pki/consumer/cert.pem
2015-08-27 15:42:23,289 [DEBUG]  @subscriptionmanager.py:146 - Checking if server has capability 'hypervisor_async'

Actual results:
It hasn't shown any remind info in the virt-who log. Therefore, it's hard for customers to know filter_host_parents has taken effect or not.

Expected results:
It should show some remind info in the virt-who log when virt-who run with these two configures in these two modes
For instance: "filter_host_parents is not support in rhevm mode now, ignore it"

Additional info:
When virt-who run at hyperv mode, it has the same problem.