ServerInvoker does not close StreamHandler in the case of "addstreamcallback"

This started out http://community.jboss.org/thread/163742 and in Teiid project we created a JIRA for this https://issues.jboss.org/browse/TEIID-1511

while debugging for this issue, I found that in ServerInvoker, for "AddStreamCallback" block in the "handleInternalInvocation" method it does not close the stream handler once it is done. This results in open socket connection. I am not sure if this connection closes after some idle time, but in our case user is rapidly going through deploy and undeploy action, results in too many open files. I created a patch and tested with our usecase, the problem no longer exists. Please find attached patch