server: libxtreemfs for Java: Fixed bug that file handles used for async file...

server: libxtreemfs for Java: Fixed bug that file handles used for async file size updates were not subtracted from counter of open file handles.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3552 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534