[11u] RFR (XS): 8223504: improve performance of forall loops by better inlining of "iterator()" methods.

[Dmitry Chuyko]

Hello,

Original RFE: https://bugs.openjdk.java.net/browse/JDK-8223504

Original patch mostly applies cleanly except do_klass() addition in 
systemDictionary.hpp which was mechanically reproduced with an extra 
parameter.

11u webrev: http://cr.openjdk.java.net/~dchuyko/8223504/webrev.11u.00/

Testing: tier1, tier2.

--
Thanks,
-Dmitry