Remove org.openide.util.Exceptions-related code

NetBeans auto-generated code in a Test Package
differently from how it would in a Source
Package -- which I did not realize would not run
in Travis.

Author: idodeclare

test/org/opensolaris/opengrok/util/StreamUtils.java

@@ -31,7 +31,6 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import static org.junit.Assert.assertNotNull;
-import org.openide.util.Exceptions;
 import org.opensolaris.opengrok.analysis.CtagsReader;
 import org.opensolaris.opengrok.analysis.Definitions;
 import org.opensolaris.opengrok.analysis.StreamSource;