fixed kestone fernet prechecks for multinode deployments
fixed kestone fernet prechecks for multinode deployments

command fails since it is a compound command. Changed to a single awk
command instead.

Closes-Bug: #1629206

Change-Id: Id7963b15c3321eca6f891a625b1ba140dc57aa22

nihilifer/kolla,intel-onp/kolla,openstack/kolla,coolsvap/kolla,mandre/kolla,mandre/kolla,stackforge/kolla,coolsvap/kolla,mandre/kolla,dardelean/kolla-ansible,intel-onp/kolla,rahulunair/kolla,nihilifer/kolla,rahulunair/kolla,GalenMa/kolla,openstack/kolla,mrangana/kolla,GalenMa/kolla,dardelean/kolla-ansible,stackforge/kolla,mrangana/kolla,dardelean/kolla-ansible,coolsvap/kolla,stackforge/kolla