Fix FELIX-4034

Define the DSL, the @Configuration annotation

Implement the processor looking at the @Configuration annotation and creating the instance declaration

Add some tests

I also introduce a couple of utility class to simplify reflection.

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1471456 13f79535-47bb-0310-9956-ffa450edef68