Summary: Remove obsolete code that relates to ISM which was used only on Solaris 8.
Reviewed-by: kvn, twisti

Summary: Make the destructor virtual (note more non-compiler hotspot errors occur downstream)
Reviewed-by: kvn, twisti

Summary: Disable the test for SPARC and reduce the number of test iterations
Reviewed-by: kvn

Summary: Limit the size of the code cache to at most 2G when arguments are checked; added regression test
Reviewed-by: kvn, twisti

8020059: The flag introduced by 8014972 is not defined if Hotspot is built  without a compiler (zero, ppc64 core build).
Summary: define CodeCacheMinimumUseSpace flag for cppInterpeter build.
Reviewed-by: kvn

Reviewed-by: jcoomes