virt-who cannot connect to Hyper-V, error "HyperVException: Communication with Hyper-V failed, HTTP error: 415"

Issue

• virt-who cannot connect to Hyper-V, error:

2016-03-01 16:13:43,313 [DEBUG]  @hyperv.py:172 - Hyper-V url: http://SCVMM-Server:5985/wsman
2016-03-01 16:13:43,327 [DEBUG]  @hyperv.py:222 - Using NTLM authentication
2016-03-01 16:13:43,368 [DEBUG]  @hyperv.py:249 - NTLM authentication successful
2016-03-01 16:13:43,421 [ERROR]  @virt-who.py:210 - Unable to recover, retry in 60 seconds.
2016-03-01 16:14:43,413 [DEBUG]  @hyperv.py:172 - Hyper-V url: http://SCVMM-Server:5985/wsman
2016-03-01 16:14:43,430 [DEBUG]  @hyperv.py:222 - Using NTLM authentication
2016-03-01 16:14:43,471 [DEBUG]  @hyperv.py:249 - NTLM authentication successful
2016-03-01 16:14:43,523 [ERROR]  @virt-who.py:207 - Error in communication with virt backend, trying to recover:
Traceback (most recent call last):
  File "/usr/share/virt-who/virt-who.py", line 198, in _send
    virtualGuests = self.virt.getHostGuestMapping()
  File "/usr/share/virt-who/hyperv.py", line 277, in getHostGuestMapping
    uuid = hypervsoap.Enumerate("select BIOSGUID from Msvm_VirtualSystemSettingData where SettingType = 3")
  File "/usr/share/virt-who/hyperv.py", line 95, in Enumerate
    response = self.post(data)
  File "/usr/share/virt-who/hyperv.py", line 75, in post
    raise HyperVException("Communication with Hyper-V failed, HTTP error: %d" % response.status)
HyperVException: Communication with Hyper-V failed, HTTP error: 415
2016-03-01 16:14:43,524 [DEBUG]  @hyperv.py:172 - Hyper-V url: http://SCVMM-Server:5985/wsman
2016-03-01 16:14:43,539 [DEBUG]  @hyperv.py:222 - Using NTLM authentication
2016-03-01 16:14:43,576 [DEBUG]  @hyperv.py:249 - NTLM authentication successful