Close resource leak in temporary file manager.

[mtbc]

Note that the class has associated unit tests which may assist in testing this PR.

[jburel]

@MtC: see http://trac.openmicroscopy.org.uk/ome/ticket/383, we could maybe start with that test ;-) and remove the System.err/out

[mtbc]

True, but in this case we definitely want some of the standard file descriptor output because the class is also offering a command-line interface that prints stuff out for the user; rather than removing them, we'd probably have to somehow thread logic through to check how the methods are being called.

[joshmoore]

Agreed: Since this is a command-line tool, it definitely needs System.out|err.

[jburel]

ok.

[joshmoore]

Trivial invocation worked cleanly.

omero@gretzky:~/OMERO-CURRENT/lib/server$ java -cp blitz.jar:server.jar omero.util.TempFileManager clean
Deleted: /home/omero/omero/tmp/omero_omero/13576
Deleted: /home/omero/omero/tmp/omero_omero/27933
Deleted: /home/omero/omero/tmp/omero_omero/2623
Deleted: /home/omero/omero/tmp/omero_omero/27934
Deleted: /home/omero/omero/tmp/omero_omero/7139
Deleted: /home/omero/omero/tmp/omero_omero/28778
Deleted: /home/omero/omero/tmp/omero_omero/2277
...