Description of problem:
When system registered to stage candlepin, run virt-who with --sam/satellite6 in CLI,virt-who still can send mapping info to stage candlepin.

Version-Release number of selected component (if applicable):
virt-who-0.17-7.el7.noarch
subscription-manager-1.17.10-1.el7.x86_64
python-rhsm-1.17.6-1.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Register system to stage candlepin
2. Run virt-who in CLI with --sam/--satellite6
[root@cloud-qe-16-vm-03 ~]# virt-who --hyperv --hyperv-owner=8036391 --hyperv-env=Library --hyperv-server=10.73.5.203 --hyperv-username=administrator --hyperv-password=Welcome1 -o -d --sam
or 
[root@cloud-qe-16-vm-03 ~]# virt-who --hyperv --hyperv-owner=8036391 --hyperv-env=Library --hyperv-server=10.73.5.203 --hyperv-username=administrator --hyperv-password=Welcome1 -o -d --satellite6
2016-08-19 02:19:54,065 [virtwho.init INFO] MainProcess(15478):MainThread @main.py:main:160 - Using configuration "env/cmdline" ("hyperv" mode)
2016-08-19 02:19:54,066 [virtwho.init INFO] MainProcess(15478):MainThread @main.py:main:162 - Using reporter_id='cloud-qe-16-vm-03.idmqe.lab.eng.bos.redhat.com-41e2151a02208a886d33766e1c88c11e'
2016-08-19 02:19:54,109 [virtwho.env_cmdline DEBUG] MainProcess(15478):MainThread @hyperv.py:__init__:472 - Hyper-V url: http://10.73.5.203:5985/wsman
2016-08-19 02:19:54,115 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @virt.py:run:364 - Virt backend 'env/cmdline' started
2016-08-19 02:19:54,761 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @hyperv.py:retry_ntlm_negotitate:64 - Using NTLM authentication
2016-08-19 02:19:55,382 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @hyperv.py:retry_ntlm_authenticate:77 - Sending NTLM authentication data
2016-08-19 02:19:55,706 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @hyperv.py:retry_ntlm_authenticate:100 - NTLM authentication successful
2016-08-19 02:19:55,715 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @hyperv.py:getHostGuestMapping:520 - Unable to enumerate using root/virtualization namespace, trying root/virtualization/v2 namespace
2016-08-19 02:20:02,162 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @virt.py:enqueue:357 - Report for config "env/cmdline" gathered, putting to queue for sending
2016-08-19 02:20:02,166 [virtwho.env_cmdline DEBUG] HyperV-1(15485):MainThread @virt.py:run:385 - Virt backend 'env/cmdline' stopped after sending one report
2016-08-19 02:20:02,193 [virtwho.main DEBUG] MainProcess(15478):MainThread @subscriptionmanager.py:_connect:123 - Authenticating with certificate: /etc/pki/consumer/cert.pem
2016-08-19 02:20:02,737 [virtwho.main DEBUG] MainProcess(15478):MainThread @subscriptionmanager.py:hypervisorCheckIn:171 - Checking if server has capability 'hypervisor_async'
2016-08-19 02:20:03,279 [virtwho.main DEBUG] MainProcess(15478):MainThread @subscriptionmanager.py:hypervisorCheckIn:183 - Server does not have 'hypervisors_async' capability
2016-08-19 02:20:03,280 [virtwho.main INFO] MainProcess(15478):MainThread @subscriptionmanager.py:hypervisorCheckIn:194 - Sending update in hosts-to-guests mapping for config "env/cmdline": 1 hypervisors and 2 guests found
2016-08-19 02:20:03,281 [virtwho.main DEBUG] MainProcess(15478):MainThread @subscriptionmanager.py:hypervisorCheckIn:195 - Host-to-guest mapping: {
    "564D900A-2E82-672D-2CB7-C17F0B3FF876": [
        {
            "guestId": "EBBF4A99-85AD-0947-AB31-45DD18FE96E5", 
            "state": 1, 
            "attributes": {
                "active": 1, 
                "virtWhoType": "hyperv"
            }
        }, 
        {
            "guestId": "3A830D1F-AC88-EA45-94D2-9AF69CCEAE6D", 
            "state": 1, 
            "attributes": {
                "active": 1, 
                "virtWhoType": "hyperv"
            }
        }
    ]
}
2016-08-19 02:20:03,873 [virtwho.main DEBUG] MainProcess(15478):MainThread @executor.py:send_report:101 - Report for config "env/cmdline" sent
2016-08-19 02:20:03,875 [virtwho.main DEBUG] MainProcess(15478):MainThread @__main__.py:main:19 - virt-who terminated
2016-08-19 02:20:03,876 [virtwho.main DEBUG] MainProcess(15478):MainThread @executor.py:terminate:303 - virt-who is shutting down

Actual results:
virt-who can report host/guest associations to stage candlepin.

Expected results:
Virt-who shouldn't report host/guest associations to stage candlepin since virt-who run with --sam/--satellite6, it should show some remind info. such as:
"--sam/--satellite6 is not supported on stage candlepin, exiting"

Additional info: