Bad formatting when logging state information

[DomGarguilo]

When an exception occurs when running rwalk, the state information gets logged.

One of the logs is the lastIndexRow which gets printed like this:

lastIndexRow: class org.apache.hadoop.io.Text - ����-T�g����Uj<�s�S

There is some logic to format various Object types before printing them and I'm thinking a case could be added to this section to format the value of lastIndexRow too:

accumulo-testing/src/main/java/org/apache/accumulo/testing/randomwalk/Module.java

Lines 346 to 362 in ae9c465

	log.debug("State information");
	for (String key : new TreeSet<>(state.getMap().keySet())) {
	Object value = state.getMap().get(key);
	String logMsg = " " + key + ": ";
	if (value == null)
	logMsg += "null";
	else if (value instanceof String || value instanceof Map || value instanceof Collection
	|| value instanceof Number)
	logMsg += value;
	else if (value instanceof byte[])
	logMsg += new String((byte[]) value, UTF_8);
	else if (value instanceof PasswordToken)
	logMsg += new String(((PasswordToken) value).getPassword(), UTF_8);
	else
	logMsg += value.getClass() + " - " + value;
	log.debug(logMsg);

Maybe something similar to apache/accumulo#2906 could be done here.