[11] Review Request: 8203308 Remove the appletviewer classes

[Sergey Bylokhov]

Hello.
Please review the fix for jdk11.

Bug: https://bugs.openjdk.java.net/browse/JDK-8203308
Webrev: http://cr.openjdk.java.net/~serb/8203308/webrev.00

Description:
  - Implementation of the AppletViewer was removed
  - Tests in sun/applet were removed and TEST.ROOT/TEST.groups were updated
  - Small update in make file was done

We still have a few classes in sun.applet package which are related to 
the client security, sound. I think that we can drop it as well at some 
point.

-- 
Best regards, Sergey.