[TEST_BUG] [macosx] Test closed/java/awt/Robot/RobotWheelTest/RobotWheelTest fails for Mac only

JDK tested: 9b60
OS tested: Mac 10.10 , Mac10.9 ,Linux
Is it a regression? NO
Is it platform specific? Yes( Fails on Mac and Passes in Linux)
The is failure reproduced: always
      
General description:

----------System.out:(25/1869)----------
robot.mouseWheel() failed w/ wheelAmt = -1, correctVal = -1 currentVale = 1
robot.mouseWheel() failed w/ wheelAmt = 2, correctVal = 1 currentVale = -1
robot.mouseWheel() failed w/ wheelAmt = -3, correctVal = -2 currentVale = 2
robot.mouseWheel() failed w/ wheelAmt = 4, correctVal = 2 currentVale = -2
robot.mouseWheel() failed w/ wheelAmt = -5, correctVal = -3 currentVale = 3
robot.mouseWheel() failed w/ wheelAmt = 6, correctVal = 3 currentVale = -3
robot.mouseWheel() failed w/ wheelAmt = -7, correctVal = -4 currentVale = 4
robot.mouseWheel() failed w/ wheelAmt = 8, correctVal = 4 currentVale = -4
robot.mouseWheel() failed w/ wheelAmt = -9, correctVal = -5 currentVale = 5
robot.mouseWheel() failed w/ wheelAmt = 10, correctVal = 5 currentVale = -5
robot.mouseWheel() failed w/ wheelAmt = -11, correctVal = -6 currentVale = 6
robot.mouseWheel() failed w/ wheelAmt = 12, correctVal = 6 currentVale = -6
robot.mouseWheel() failed w/ wheelAmt = -13, correctVal = -7 currentVale = 7
robot.mouseWheel() failed w/ wheelAmt = 14, correctVal = 7 currentVale = -7
robot.mouseWheel() failed w/ wheelAmt = -15, correctVal = -8 currentVale = 8
robot.mouseWheel() failed w/ wheelAmt = 16, correctVal = 8 currentVale = -8
robot.mouseWheel() failed w/ wheelAmt = -17, correctVal = -9 currentVale = 9
robot.mouseWheel() failed w/ wheelAmt = 18, correctVal = 9 currentVale = -9
robot.mouseWheel() failed w/ wheelAmt = -19, correctVal = -10 currentVale = 10
robot.mouseWheel() failed w/ wheelAmt = 20, correctVal = 10 currentVale = -10
robot.mouseWheel() failed w/ wheelAmt = -21, correctVal = -11 currentVale = 11
robot.mouseWheel() failed w/ wheelAmt = 22, correctVal = 11 currentVale = -11
robot.mouseWheel() failed w/ wheelAmt = -23, correctVal = -12 currentVale = 12
robot.mouseWheel() failed w/ wheelAmt = 24, correctVal = 12 currentVale = -12
testPasses = 1, NUMTESTS = 25
----------System.err:(5/343)----------
RobotWheelTest$TestFailsException: Test ran, but failed!
at RobotWheelTest.start(RobotWheelTest.java:109)
at com.sun.javatest.regtest.agent.AppletWrapper$AppletRunnable.run(AppletWrapper.java:158)
at java.lang.Thread.run(Thread.java:745)
STATUS:Failed.Applet thread threw exception: RobotWheelTest$TestFailsException: Test ran, but failed!