Event Admin Java Concurrency Changes

[Bob Paulin]

I noticed in https://issues.apache.org/jira/browse/FELIX-3511 Java 
Concurrency is being introduced to the code base.  A couple of thoughts 
on this.

1) With this not being backwards compatible with earlier versions does 
it make sense to increment at least the minor version (ie 1.3 -> 1.4).  
Java 8 introduces a slew of incompatibility with prior releases with the 
changes to the collection libraries so I'm curious how other projects 
are handling this.

2) Event admin has no tests.  I would be interested in working on 
creating some tests for this project.  Any thoughts on where to begin 
with this effort?

3) It appears there maybe other areas of the event admin code that might 
benefit from the Concurrency objects.  Perhaps the use of one of the 
Queue constructs for holding some of the asynchronous events.  Thoughts 
on this?

- Bob