Bug 4290 related: Remove <version> from org.osgi.service.event dep.
Bug 4290 related: Remove <version> from org.osgi.service.event dep.

Because in c/58362 that was added to oldparent dependencyManagement, and
it seems wiser to declare this in only a single place, to avoid possible
version discrepancy problems re. this artifact in the future.

Change-Id: Ic1062efa211c6c5be4ece11a16c0191489d0bf42
Signed-off-by: Michael Vorburger <4d49e7cce9f97fb576795ab27509f7ee282641f6@redhat.com>
opendaylight/controller