Pin kafka java version to 8 on ubuntu
Pin kafka java version to 8 on ubuntu

Ubuntu default-jre-headless is not working with kafka

Change-Id: Ic6ab66128efa931277516e0cf5848a816ca676ad
Closes-Bug: #1824847

stackforge/kolla,openstack/kolla,openstack/kolla,stackforge/kolla,rahulunair/kolla,rahulunair/kolla,stackforge/kolla