RFR: 8200630: Globally suppress Visual Studio warning C4351

Tue Apr 3 21:00:36 UTC 2018

Please review this change to globally suppress Visual Studio warning
C4351.  This warning is entirely useless to us.  All it does is
interfere with writing clear and correct code.  (See bug for more
details.)

This change also removes the one existing occurrence of local
suppression of this warning, which is no longer needed.

CR:
https://bugs.openjdk.java.net/browse/JDK-8200630

Webrev:
http://cr.openjdk.java.net/~kbarrett/8200630/open.00/

Testing:
Build on all Oracle supported platforms, and ran hs-tier1.