FELIX-3827 - Bnd iPOJO Plugin, error when manipulating embed jars/bundles

* Deal with components embed in Bundle-Classpath
* Added a property (include-embed-bundles) to activate that behavior
* If embed dependency is already manipulated, its already generated IPOJO-Component
  header is merged within the bnd generated Manifest
* If embed contains annotated iPOJO classes, but has not been manipulated, 
  components are manipulated and the generated byte code is placed in the
  generated bundle (we don't touch the embed dependency)


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1429888 13f79535-47bb-0310-9956-ffa450edef68