regression test javax/swing/ToolTipManager/Test6256140.java failed on ubuntu 13; it passed on oel 5.7 and ubuntu 12
tested with jdk's: 8b103, 8b57, 7u25b15 - failed with all

failure log:
----------System.out:(0/0)----------
----------System.err:(13/714)----------
java.lang.RuntimeException: Tooltip is not shown
at Test6256140.main(Test6256140.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:724)