[9] Review Request: 6302052 Reference to nonexistant Class in javadoc

[Sergey Bylokhov]

Hello.
Please review the small fix for jdk 9. Typo was fixed as suggested in 
the CR.

Bug: https://bugs.openjdk.java.net/browse/JDK-6302052
Webrev can be found at: http://cr.openjdk.java.net/~serb/6302052/webrev.00

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Best regards, Sergey.