Code Review Request, JDK-8210334, TLS 1.3 server fails if ClientHello doesn't have pre_shared_key and psk_key_exchange_modes

[Xuelei Fan]

Hi,

Please review:
    http://cr.openjdk.java.net/~xuelei/8210334/webrev.00/

Simple update, no new regression test.

Thanks,
Xuelei