housekeeping in invocation packages

SourceForge Submitter: rodburgett .
Aside from the socket.close(), there is no explicit api to
clean up the connection accept Thread used by RMI
remote sockets. The only possible clean up actions for
source code are to close the socket and null connection
references. Three classes in the
org.jboss.invocation.jrmp.server and
org.jboss.invocation.pooled.server packages are lacking
in this area.

The JRMPInvoker32.diff file updates 2 methods in the
JRMPInvoker class to facilitate garbage collection. A line
is added to the unexportCI() method to null out the
invokerStub reference, and 2 lines are added to
stopService() method to null client and server socket
factories.

The stopService() method of
org.jboss.invocation.jrmp.server.JRMPProxyFactory is
incomplete, the JRMPProxyFactory32.diff file adds lines
to null out the proxy reference and clear the
interceptors container.

The stopService() method of
org.jboss.invocation.pooled.server.PooledInvoker should
close its ServeSocket and null out the reference. The
PooledInvoker32.diff file adds a try block to attempt a
close. It also sets the socket reference to null.