RFR: JDK-8075521 api/jdk/dio/uart/UARTEvent tests hang

[alexey karaksin]

looks good.

On 07.04.2015 15:05, Sergey Nazarkin wrote:
> issue: https://bugs.openjdk.java.net/browse/JDK-8075521
> review: http://cr.openjdk.java.net/~snazarki/8075521/
>
> Hi!
>
> Please review the changes to resolve TCK failure caused by deadlock
>