--== NETWORK CONFIGURATION ==--
         
[ ERROR ] Failed to execute stage 'Environment customization': <Fault 1: "<type 'exceptions.TypeError'>:cannot marshal None unless allow_none is enabled">
[ INFO  ] Stage: Clean up
[ INFO  ] Generating answer file '/var/lib/ovirt-hosted-engine-setup/answers/answers-20160208160536.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ ERROR ] Hosted Engine deployment failed: this system is not reliable, please check the issue, fix and redeploy
          Log file is located at /var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20160208160523-r1alx7.log