Admin user fails to login on RHEV Hypervisor with python error "KeyError: 'info'"

Issue

• Admin login fails immediately after authenticating password with following python trace .

Traceback (most recent call last):
  File "/usr/lib64/python2.6/runpy.py", line 122, in _run_module_as_main
  File "/usr/lib64/python2.6/runpy.py", line 34. in _run_code
  File "/usr/lib64/python2.6/site-packages/ovirt/node/setup/_main_.py", line 48, in <module>
  File "/usr/lib64/python2.6/site-packages/ovirt/node/app.py", line 265, in run
  File "/usr/lib64/python2.6/site-packages/ovirt/node/app.py", line 353, in _load_plugins
  File "/usr/lib64/python2.6/site-packages/ovirt/node/setup/vdsm/_init_.py", line 26, in createPlugins
  File "/usr/lib64/python2.6/site-packages/ovirt/node/setup/vdsm/engine_page.py", line 98, in _init_
  File "/usr/lib64/python2.6/site-packages/ovirt/node/setup/vdsm/engine_page.py", line 57, in sync_mgmt
KeyError: 'info'

• After modifying Hypervisor network configuration, admin user login fails .
• After manual configuration of network on Hypervisor , hypervisor UI crashes with python error .