RFR (S) 8236224: Obsolete the FieldsAllocationStyle and CompactFields options

[coleen.phillimore at oracle.com]

Summary: Remove the options and code for options deprecated in JDK 14

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8236224.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8236224

Ran tier1 on all oracle platforms, and 2, 3 on linux/windows-x64-debug 
and hs-tier4-graal because there were jvmci changes.

thanks,
Coleen