RFR: 8210989 TLSv1.2 not authenticating using PSS certificates

[Jamil Nimeh]

Hello all, this fixes an issue where for TLSv1.2 connections 
specifically, clients will not authenticate using PSS certs even when 
PSS signature algorithms are asserted in the CertificateRequest 
message.  This brings in a method for client certificate selection 
similar to how we do it for TLS 1.3.  TLS 1.3, 1.1 and 1.0 client 
certificate selection is not affected by this fix.

JBS: https://bugs.openjdk.java.net/browse/JDK-8210989
Webrev: http://cr.openjdk.java.net/~jnimeh/reviews/8210989/webrev.01/

--Jamil