maven-osgi-0.3.0-bp160.1.10

- Upgrade to the last tag before retiring and name it 0.3.0, since
  the version in pom file is 0.3.0-SNAPSHOT
  * no changelog provided
  * ported from plexus-maven-plugin to plexus-component-metadata
- Remove dependency on the old maven2 package
- Fetch source code from git using source service and clean it of
  the bundled jars

- Build with java source and target levels 8

- Specify maven.compiler.release to fix build with jdk9+ and newer
  maven-javadoc-plugin

- Initial packaging of maven-osgi 0.2.0