This test doesn't clean-up and leaves a background then running in samevm or agentvm mode.

"Thread-4259" #6233 daemon prio=5 os_prio=0 tid=0x26517000 nid=0x21a8 waiting on condition [0x29f2f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at StackTraces$DumpThread.run(StackTraces.java:68)