skip two v6 dualnet tests due to the way how RHEL is bringing up nics
skip two v6 dualnet tests due to the way how RHEL is bringing up nics

Change-Id: Ieeed19c98e7a459492fbe4eb2c92dac161fff154

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared