Implement generic CLI options->opcode updates

This patch changes SubmitOpCode and SubmitOrSend such that we have a
single function that does generic CLI options to opcode attributes
function. This will allow, once all scripts pass the opts argument to
SubmitOpCode, to pass the debug parameter or the dry-run one to the LUs.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>