Bug 4964: Add akka/scala dependencies and karaf features

Bug 4964: Add akka/scala dependencies and karaf features

Added akka and scala dependency definitions from the controller project
to the odlparent pom so they're avaialble to project. These definitions
will be removed from the controller commons pom.

Also added the akka features.xml from the controller project which will
be subsequently removed. The artifactId is now
org.opendaylight.odlparent instead of org.opendaylight.controller.

Akka 2.4.1 requires com.typesafe/config version 1.3.0 so the version was
bumped.

Change-Id: Ia6c3918f2854b1b6dcbc8fc2e3325f227edc3e18
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>