fixed breaking test (mock op needed)
POC for loading modules from uber (aka "fat") jar files

Drop a jar file with its deps packaged inside
a "lib" dir into the "modules" directory. An AppContext
will be deployed in a separate Thread with a ThreadContextClassLoader
to isolate its dependencies. The context file is assumed to be
at META-INF/spring/<module name>.xml.

Right now stuck on StreamPlugin trying to get Channels
from the module (currently throws an NPE). Need to explore
if modules can register with shared channel registry 
in parent context or if there is some other way to do this.

See the module working by running the JarModuleTest. 
Build the feed sample from https://github.com/jencompgeek/feed-sample
and copy the uberjar (target/feed-1.0.0-BUILD-SNAPSHOT-full.jar) to 
the location specified in the test (be sure to rename it just "feed.jar").
You should see "Dispatcher has no subscriber" errors on test run.
Debugging will show you that feed polling is occurring.