RFR (S) 8214822: Move ConcurrentHashTable VALUE parameter to CONFIG

[coleen.phillimore at oracle.com]

Summary: make VALUE parameter be included in CONFIG configuration, also 
remove BaseConfig

Tested with tier1-3.

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8214822.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8214822

Thanks,
Coleen