ResourceManager.getApplicationResources() does not close InputStreams

com.sun.naming.internal.ResourceManager.getApplicationResources() does not close the input streams it gets from helper.getResources() and helper.getJavaHomeLibStream().

While they will eventually be garbage collected and finalised, not calling close() means that the file descriptors are open longer than they need to, potentially causing a descriptor limit to be reached.

See http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1197