RFR JDK-8239595/JDK-8239594 : ssl context version is not respected/jdk.tls.client.protocols is not respected

[rahul . r . yadav]

Hello,

Request to have my fix reviewed for issues:
    JDK-8239595 : ssl context version is not respected
    JDK-8239594 : jdk.tls.client.protocols is not respected

The fix updates 
jdk.internal.net.http.HttpClientImpl.getDefaultParams(SSLContext ctx)
to use ctx.getDefaultSSLParameters()instead of 
ctx.getSupportedSSLParameters(),
as the latter does not respect the context parameters set by the user.

Issue: https://bugs.openjdk.java.net/browse/JDK-8239595
Issue: https://bugs.openjdk.java.net/browse/JDK-8239594

Webrev: 
http://cr.openjdk.java.net/~jboes/rayayada/webrevs/8239595/webrev.00/

-- Rahul