Summary: Remove G1RemSet base class and StupidG1RemSet class; rename HRInto_G1RemSet to just G1RemSet.
Reviewed-by: ysr, tonyp

Reviewed-by: kvn, iveresov, jcoomes

Reviewed-by: iveresov, kvn, kamg

Summary: Set upper limit 256 for ObjectAlignmentInBytes value.
Reviewed-by: never, iveresov

Summary: Fix ciMethod::instructions_size() to return correct value
Reviewed-by: kvn, twisti

Reviewed-by: twisti, kvn, iveresov