RFR:8168316: Suppress deprecation warnings for Applet classes in java.desktop

[Philip Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8168316
Webrev: http://cr.openjdk.java.net/~prr/8168316/
When applets were deprecated it seems that due to all deprecated
warning being suppressed in java.desktop many places that should
have been updated weren't

This resolves the applet ones .. as a precursor to fixing up the other 
issues
that cause this global supression.

-phil