[9] Review Request: 8076178 [macosx] Few open swing and awt reg-tests fail after their update to avoid SunToolkit.realSync

[Sergey Bylokhov]

Hello.
Please review the fix for jdk9.

The workaround for JDK-7185258 is removed, because it cause instability 
or failures of a number of tests.
Note that the bug JDK-7185258 is not OSX specific, see JDK-8132664.
Bug: https://bugs.openjdk.java.net/browse/JDK-8076178
Webrev can be found at: http://cr.openjdk.java.net/~serb/8076178/webrev.00

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Best regards, Sergey.