<AWT Dev> Review request for JDK-8039279: Move first batch of functional tests to openjdk repository

[Dmitriy Ermashov]

Hi,
Please, review the changeset for:
https://bugs.openjdk.java.net/browse/JDK-8039279

Webrev is here:
http://cr.openjdk.java.net/~yan/8039279/webrev.03/

Changelist:
1. Removed internal API usage (sun.awt.*)
2. Removed Asserts library dependency from all tests except of 
ModifierRobotKeyTest (too much usage of asserts in it).
3. Improved thread synchronization in ComponentPreferredSize, 
ChangeGridSize, ModifierRobotKeyTest, LockingKeyStateTest
4. Added disposing frame at the end of each test.

Test runs on the following platforms seems stable:
Windows 7 x64, Intel graphical card
Ubuntu Linux 12.04 x64, Intel graphical card
OS X 10.8.5 x64, NVIDIA GeForce 9400
Ubuntu 10.04 ARMv7

--Dima