maven-osgi-exec-plugin does currently not follow Maven's naming conventions for 3rd party plugins:
Artifact Ids of the format maven-___-plugin are reserved for
plugins in the Group Id org.apache.maven.plugins
Please change your artifactId to the format ___-maven-plugin
In the future this error will break the build.
I would suggest to simply name the plugin equinox-maven-plugin.
Later it may provide the goals configure, run (instead of exec-osgi) and test.