RFR (T, urgent) 8224010: Incorrect string interning

[coleen.phillimore at oracle.com]

Summary: Revert jvmci change made with Symbol THREAD change.

Tested with tier4 testing.  Almost done with no failures.

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8224010.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8224010

Thanks,
Coleen