GenerateMetadataMojo.computePackageType does not work correctly for OSGi configurations/bundles

Currently https://github.com/apache/jackrabbit-filevault-package-maven-plugin/blob/trunk/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/GenerateMetadataMojo.java#L1134 will output "application" for packages containing OSGi configurations or bundles! Instead it must emit "container" or "mixed" according to https://issues.apache.org/jira/browse/JCRVLT-170.