JDI stress/serial/mixed002 needs to use WhiteBox.deflateIdleMonitors support

The following test failed in the JDK15 CI:

vmTestbase/nsk/jdi/stress/serial/mixed002/TestDescription.java

Here's a snippet from the log file:

Thread state: 0
Debugger nsk.jdi.ThreadReference.forceEarlyReturn.forceEarlyReturn003.forceEarlyReturn003@584cc551 finished successfully
debugee.stderr> Debuggee: received the command: quit
debugee.stderr> Debuggee: exiting
debugee.stderr> Debuggee nsk.share.jdi.AbstractJDIDebuggee@4e515669 finished successfully
debugee.stderr> Debuggee nsk.share.jdi.SerialExecutionDebuggee : sending the command: ready
debugee.stderr> Debuggee: received the command: COMMAND_CLEAR_DEBUGGEE
debugee.stderr> Debuggee nsk.share.jdi.SerialExecutionDebuggee : sending the command: ready
Execute debugger: nsk.jdi.ThreadReference.ownedMonitorsAndFrames.ownedMonitorsAndFrames001.ownedMonitorsAndFrames001@7025bdc7
debugee.stderr> Debuggee: received the command: COMMAND_EXECUTE_DEBUGGEE:nsk.share.jdi.AbstractJDIDebuggee
debugee.stderr> Debuggee nsk.share.jdi.AbstractJDIDebuggee : sending the command: ready
debugee.stderr> Debuggee: received the command: createStateTestThread
debugee.stderr> Debuggee nsk.share.jdi.AbstractJDIDebuggee : sending the command: ready
# ERROR: Test bug in nsk.jdi.ThreadReference.ownedMonitorsAndFrames.ownedMonitorsAndFrames001.ownedMonitorsAndFrames001@7025bdc7: nsk.share.TestBug: There are more than one(2) instance of 'nsk.share.jpda.StateTestThread in debuggee
nsk.share.TestBug: There are more than one(2) instance of 'nsk.share.jpda.StateTestThread in debuggee
at nsk.share.jdi.TestDebuggerType2.findSingleObjectReference(TestDebuggerType2.java:264)
at nsk.jdi.ThreadReference.ownedMonitorsAndFrames.ownedMonitorsAndFrames001.ownedMonitorsAndFrames001.doTest(ownedMonitorsAndFrames001.java:104)
at nsk.share.jdi.SerialExecutionDebugger.executeTests(SerialExecutionDebugger.java:294)
at nsk.share.jdi.SerialExecutionDebugger.doTest(SerialExecutionDebugger.java:233)
at nsk.share.jdi.TestDebuggerType2.runIt(TestDebuggerType2.java:214)
at nsk.share.jdi.SerialExecutionDebugger.main(SerialExecutionDebugger.java:65)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at PropertyResolvingWrapper.main(PropertyResolvingWrapper.java:102)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)
debugee.stderr> Debuggee: received the command: quit
debugee.stderr> Debuggee: exiting