<Swing Dev> [9] Review Request: 7180976 Pending String deadlocks UIDefaults

[Sergey Bylokhov]

Hello.
Please review the fix for jdk 9.
In the JDK-6727661 and JDK-6727662 the  code : "= new String("Pending")" 
was changed to = "Pending".
This object is used as a marker when  we start initialization of LazyValue.
"Pending" in the test and "Pending" in the UIDefaults are pointed to the 
same object, so the loop in UIDefaults.getFromHashtable() will hang.
This flag was added in the JDK-4101618 and it does not seem the string 
type was necessary, so I change it to the simple object, to prevent 
similar regression in the future

Bug: https://bugs.openjdk.java.net/browse/JDK-7180976
Webrev can be found at: http://cr.openjdk.java.net/~serb/7180976/webrev.00

-- 
Best regards, Sergey.