In Ubuntu 16.04 corosync package is
splitted. "fuel-rabbit-fence" package
needs "notifyd"-part, so depends are
updated.
* ensure corosync necessary directories
* don't run sed on Ubuntu 16.04
blueprint: mos-xenial
Closes-bug: #1587075
Change-Id: I241a7976ad0c347167938a3b2656f633bc988046