[8u] RFR: 8206189: sun/security/pkcs12/EmptyPassword.java fails with Sequence tag error

[Alexey Bakhtin]

Hello,

Please review the backport of DK-8206189 to 8u
This is the second backport in the series required for JDK-8076190 [1]

JBS: https://bugs.openjdk.java.net/browse/JDK-8206189
Original patch: http://hg.openjdk.java.net/jdk/jdk11/rev/038688fa32d0
8u webrev: http://cr.openjdk.java.net/~abakhtin/8206189/webrev.v0/

Original patch applied almost clean except for two differences:
- one of the blocks is not applied cleanly because JDK-8234042 [1] already applied and JDK8 already verifies certValues length
- JDK8 has a strict class cast to Object which is not necessary for JDK11

The initial review has been posted on [2]

[1] https://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/3054a00b5333
[2] https://mail.openjdk.java.net/pipermail/jdk8u-dev/2021-May/013799.html

Regards
Alexey