[TEST_BUG] closed/javax/swing/SwingGraphics/VolatileBackBuffer/MultimonVImage.java shouild be modified

1. According to instruction "This test should be run on any Windows platform that.." but in JDK-4371134 also solaris platform is described, I think we should remove "Windows" or the test should automatically pass on all non windows platforms
2. On MacOS instruction window is empty (see attached screenshot) but works fine if insert Thread.sleep(5000); after Sysout.printInstructions( instructions ); - need to use EDT and toolkit.realSync()

due instruction window is empty we can't click on pass/fail on MacOS, test exit with code 0 on closing frame:
----------System.out:(0/0)----------
----------System.err:(0/0)----------
result: Failed. Unexpected exit from test [exit code: 0]


test result: Failed. Unexpected exit from test [exit code: 0]