OSGi related build warnings

[cstamas]

The build of sisu-project emits following WARNING level messages:

[INFO] --- bnd:6.4.0:bnd-process (bnd-process) @ org.eclipse.sisu.inject.extender ---
[WARNING] /home/cstamas/Worx/eclipse-sisu/sisu-project/ANONYMOUS [0:0]: Bundle-Activator org.eclipse.sisu.launch.SisuExtender is being imported into the bundle rather than being contained inside it. This is usually a bundle packaging error

and

[INFO] --- bnd:6.4.0:bnd-process (bnd-process) @ org.eclipse.sisu.plexus.extender ---
[WARNING] /home/cstamas/Worx/eclipse-sisu/sisu-project/org.eclipse.sisu.plexus.extender/bnd.bnd [0:0]: Host org.eclipse.sisu.inject.extender= for this fragment/require bundle cannot be found on the classpath

We should review these,

[kwin]

@mcculls Is there any reason why the activator class is not part of the bundle org.eclipse.sisu.inject.extender?