Description of problem:
ansible still configure the 'networkPluginName' when setting both 'openshift_use_nuage' and 'openshift_use_openshift_sdn' to false


Version-Release number of selected component (if applicable):
openshift-ansible master

How reproducible:
always

Steps to Reproduce:
1. Install RPM environment on rhel7 
<--snip-->
openshift_use_nuage=false
openshift_use_openshift_sdn=false
<--snip-->

Actual results:

TASK: [openshift_node | Start and enable node] ******************************** 
failed: [openshift-*.lab.eng.nay.redhat.com] => {"failed": true}
msg: Job for atomic-openshift-node.service failed because the control process exited with error code. See "systemctl status atomic-openshift-node.service" and "journalctl -xe" for details.

failed: [openshift-*.lab.eng.nay.redhat.com] => {"failed": true}
msg: Job for atomic-openshift-node.service failed because the control process exited with error code. See "systemctl status atomic-openshift-node.service" and "journalctl -xe" for details.
FATAL: all hosts have already failed -- aborting

QE check the master and node configuration, ansible configure the networkPlugin


Expected results:
Should not configure networkPlugin in master and node configuration

Additional info: