-Created a ubuntu-16.04 file in vars
-Updated meta/main.yml dependencies to include xenial
as a verison of Ubuntu.
-Added cinder-16.04-support.yaml in realesenotes
-Added template files for systemd support
Implements: blueprint support-ubuntu-1604
Change-Id: Idb2f6b84fc558b21ca2dfce6121dc22ff31a659a