[8u20] RFR backport 8039150: host_klass invariant fails when verifying newly loaded JSR-292 anonymous classe,s

[Coleen Phillimore]

Summary: Initialize host_klass while parsing the class with the other 
initializations.
Reviewed-by: sspitsyn, stefank

The changes required a new changeset because removing the line with 
EnableInvokeDynamic is removed in jdk9 so caused a hg import reject.

open webrev at http://cr.openjdk.java.net/~coleenp/8039150_8u20/
bug link https://bugs.openjdk.java.net/browse/JDK-8039150_8u20

Backport requested because bug caused noise (crash) using VerifyBeforeGC 
and VerifyAfterGC against 8u40.

Thanks,
Coleen