add missing exception to log messages

Author: SylvainJuge

jmx-scraper/src/main/java/io/opentelemetry/contrib/jmxscraper/JmxScraper.java

@@ -52,7 +52,7 @@ public class JmxScraper {
   public static void main(String[] args) {
 
     // set log format
-    System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tF %1$tT %4$s %5$s%n");
+    System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tF %1$tT %4$s %5$s %6$s%n");
 
     List<String> effectiveArgs = new ArrayList<>(Arrays.asList(args));
     boolean testMode = effectiveArgs.remove(TEST_ARG);