Summary: increase class file parser's acceptable max to 51
Reviewed-by: sbohne, ikrylov

Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

Summary: A check on Code length did not take into account the old sizes of the max_stack, max_locals, and code_length.
Reviewed-by: phh, sbohne