RFR 8244565: Accept PKCS #8 with version number 1

[Weijun Wang]

Please take a review at

   http://cr.openjdk.java.net/~weijun/8244565/webrev.00/

Now we accepts a PKCS8 file with version being 0 or 1. The publicKey and attributes are still not parsed.

I also take this chance to make some format change.

There is no regression test and I'll add one. I can generate a PKCS8 key and then modify the version from 0 to 1 and try to read it. Or I can find a PKCS8 generated by some other tool and embed it the test to read it. Please advise which is better.

Thanks,
Max