The files "*component.xml" MUST be contained in the folder named "OSGI-INF"
Ahh ok, from http://wiki.osgi.org/wiki/Declarative_Services it appeared that the path can be arbitrary. I also found no further specification about "Declarative Services" in http://www.osgi.org/download/r5/osgi.core-5.0.0.pdf
Where is this specified? Sad that OSGi doesn't allow more flexibility here, but no deal breaker, as long the the filename can be freely choosen.