RFR (S) 8227123: Assertion failure when setting SymbolTableSize larger than 2^17 (131,072)

[coleen.phillimore at oracle.com]

Summary: Increase max size for SymbolTable and fix experimental option 
range.  Make experimental options trueInDebug so they're tested by the 
command line option testing

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8227123.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8227123

Tested locally with default and -XX:+UseZGC since ZGC has a lot of 
experimental options.  I didn't test with shenanodoah.

I will test with hs-tier1-3 before checking in.

Thanks,
Coleen