Xenial uses systemd which does have a sysv init script compatbility
layer but you must instruct systemd to reload its config after
installing any init scripts for this to work. Hack this in by adding an
exec for `systemctl daemon-reload` between writing the file and starting
the wildlfy service. Ideally the wildfly module would do this for us but
this should work for now (and eventually will become redundant).
Change-Id: If5c09c0be7714ce7d03ebf364823164a34c29ae4
c5bddd9e19