RFR (T) 8220744: Move RedefineTests to from runtime to serviceability

[coleen.phillimore at oracle.com]

Summary: move tests out of runtime to jvmti/RedefineClasses

These always belonged in serviceability/jvmti.  Also, moved a couple 
tests within serviceability/jvmti to RedefineClasses also.

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8220744.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8220744

I ran these tests with make test 
TEST=open/test/hotspot/jtreg/serviceability/jvmti/RedefineClasses and 
they passed.  Tier1 testing is in progress.

Thanks,
Coleen