Ensure karaf:run (maven goal) can find a pre-built artifact

Issue: when launching "mvn package && mvn karaf:run" - the important part being the fact the karaf:run is decoralated from the build command, RunMojo#deploy does not find the bundle to deploy.

Would be neat to have a fallback on ${project.build.directory}/${project.build.finalName}.jar to let karaf:run be able to work without having to pay any build time (awesome for demo not requiring a features.xml ).

Affected version  is 4.3.0.RC1 (dont think it is in Jira yet).