[13u] RFR 8234728: Some security tests should support TLSv1.3

[Dmitry Cherepanov]

JBS: https://bugs.openjdk.java.net/browse/JDK-8234728
original patch: https://hg.openjdk.java.net/jdk/jdk14/rev/fa82151f29c4
webrev for 13u: 
http://cr.openjdk.java.net/~dcherepanov/openjdk13u/8234728/webrev.v0/

The change in NullHostnameCheck.java doesn’t apply due to different 
context (8228967 isn’t in 13u), re-applied manually.
Other parts apply cleanly.

Thanks,

Dmitry