Make maven-bundle-plugin (felix) managed and merge executions (*)
Make maven-bundle-plugin (felix) managed and merge executions (*)

Version property was a unsatisfying solution for same version in every
pom, also this alowes for shared settings.

(*) actual merge was of plugin tags. There is now only one left which
contains two execution tags.

Also, plugin version was updated.

knime-ip/knip-externals