Fix the issue #Felix-427.
Nullable object are now created with a dynamic proxy (instead of a bytecode generation).
Avoid useless object creation in the instance manager.
Change the composition creation to use Class introspection instead of Class visit (class is already loaded to compute service dependencies).

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@600287 13f79535-47bb-0310-9956-ffa450edef68
18 files changed