The URLClassLoader in ClassUtilTest does not release .jar files easily...
The URLClassLoader in ClassUtilTest does not release .jar files
easily...

Only with Java 7 does the URLClassLoader get a 'close()' method... So
for now, we simply delete the .jar file on exit, to help Windows
which likes to lock files far too much.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

scijava/scijava-common