Test cases for testing dynamic classloading turned on and off.

The client directory contains the classes needed for the client runtime and server directory for the server runtime.
The build.xml target 'jar.classloading' will build the two jars needed (jboss-remoting-server-tests.jar and
jboss-remoting-client-tests.jar).

The ant target 'classloading-test-client' can be run for the client runtime test (which will only
use the runtime jars needed for the client).  To perform the test, will also have to concurrently run
one of the following ant targets for the server tests:

classloading-test-all-server - config allows both client and server classloading
classloading-test-client-server - config allows only client side classloading
classloading-test-server-server - config allows only server side classloading
classloading-test-none-server - config does not allow any classloading (client or server side)

These have not been consolidated into a singe JUnit test case class yet that can be run with the build.

