Description of problem:
When virt-who run at vdsm/rhevm mode, During the first virt-who's loop interval(60s), add/delete/start/stop guest in rhevm, although virt-who get the updating at the first loop, it can't send the updating to server until the second loop(120s).

Version-Release number of selected component (if applicable):
virt-who-0.16-1.el6.noarch
subscription-manager-1.16.6-1.el6.x86_64
python-rhsm-1.16.4-1.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Register rhel to satellite6.1
2. Configure virt-who run at vdsm/rhevm mode, then start virt-who service
3. During the first loop, add/delete/start/stop guest in rhevm, then check virt-who's log:
# tail -f /var/log/rhsm/rhsm.log

Actual results:
Virt-who can't send the updating to server at the first loop time(60s). it will send the updating to server at the second loop(120s).

================The first loop========================
2015-12-30 02:27:35,423 [virtwho.env_cmdline DEBUG] Vdsm-1(8492):MainThread @virt.py:enqueue:331 - Report gathered, putting to queue for sending
2015-12-30 02:27:35,425 [virtwho.main DEBUG] MainProcess(8482):MainThread @virtwho.py:update_report_to_send:274 - Report for config "env/cmdline" updated

================The second loop========================
2015-12-30 02:28:34,931 [virtwho.main DEBUG] MainProcess(8482):MainThread @subscriptionmanager.py:_connect:112 - Authenticating with certificate: /etc/pki/consumer/cert.pem
2015-12-30 02:28:35,536 [virtwho.env_cmdline DEBUG] Vdsm-1(8492):MainThread @virt.py:enqueue:331 - Report gathered, putting to queue for sending
2015-12-30 02:28:36,506 [virtwho.main INFO] MainProcess(8482):MainThread @subscriptionmanager.py:sendVirtGuests:136 - Sending domain info: [
    {
        "guestId": "95524370-81bb-4726-be53-112b67206093", 
        "state": 1, 
        "attributes": {
            "active": 1, 
            "hypervisorVersion": "", 
            "virtWhoType": "vdsm", 
            "hypervisorType": "qemu"
        }
    }
]
2015-12-30 02:28:39,377 [virtwho.main INFO] MainProcess(8482):MainThread @virtwho.py:_sendGuestList:250 - virt-who guest list update successful
2015-12-30 02:28:39,378 [virtwho.main DEBUG] MainProcess(8482):MainThread @virtwho.py:send_current_report:206 - Report for config "env/cmdline" sent
2015-12-30 02:28:39,380 [virtwho.main INFO] MainProcess(8482):MainThread @virtwho.py:update_report_to_send:268 - No change in report gathered using config: "env/cmdline", report not sent.

Expected results:
As virt-who has get the h/g mapping updating at the first loop, it should send the mapping's updating to server at the first loop.

Additional info: