8132919: Put compiler tests in packages
Reviewed-by: vlivanov, dpochepk
Contributed-by: igor.ignatyev@oracle.com

8040237: nsk/jvmti/RetransformClasses/retransform001 crashed the VM on all platforms when run with with -server -Xcomp
Summary: class redefinition may cause speculative trap clean up code to dereference dead method
Reviewed-by: kvn, coleenp