HADOOP-15316. GenericTestUtils can exceed maxSleepTime. Contributed by Adam Antal.

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/GenericTestUtils.java

@@ -661,7 +661,7 @@ public abstract class GenericTestUtils {
     public Object answer(InvocationOnMock invocation) throws Throwable {
       boolean interrupted = false;
       try {
-        Thread.sleep(r.nextInt(maxSleepTime) + minSleepTime);
+        Thread.sleep(r.nextInt(maxSleepTime - minSleepTime) + minSleepTime);
       } catch (InterruptedException ie) {
         interrupted = true;
       }