7013682: two test checking cpuTime filed java/lang/management/ThreadMXBean

Typo in 6173675 fix dropped getThreadCpuTime(long) result on the floor.

Reviewed-by: mchung, dholmes

jdk/src/share/classes/sun/management/ThreadImpl.java

@@ -259,7 +259,7 @@ class ThreadImpl implements com.sun.management.ThreadMXBean {
                 if (id == Thread.currentThread().getId()) {
                     id = 0;
                 }
-                getThreadTotalCpuTime0(id);
+                times[0] = getThreadTotalCpuTime0(id);
             } else {
                 getThreadTotalCpuTime1(ids, times);
             }