hosted-engine --deploy fails with message as: Failed to execute stage 'Setup validation': [Errno 1] Unknown host

Issue

• When using hosted-engine --deploy I get the following error a the end of configuration setup:
  Failed to execute stage 'Setup validation': [Errno 1] Unknown host
• Below traceback is seen in the ovirt-hosted-engine-setup.log :

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 132, in _executeMethod
    method['method']()
  File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/gr-he-common/network/bridge.py", line 321, in _get_hostname_from_bridge_if
    hostname, aliaslist, ipaddrlist = socket.gethostbyaddr(ipaddr)
herror: [Errno 1] Unknown host