8190917: SSL session resumption broken for protocols other than TLSv1.2

[Jaikiran Pai]

I would like to contribute a patch, containing a potential fix and a 
test case, to the issue reported at 
https://bugs.openjdk.java.net/browse/JDK-8190917. This is going to be my 
first contribution to OpenJDK, so I would need some guidance/help in 
having this reviewed/merged, please.

To give a quick overview of this specific bug - the issue relates to SSL 
session resumption which is no longer functional in Java 9 for SSL 
protocols other than TLSv1.2. The JIRA itself has more extensive details 
and a test case which reproduces the issue.

So far, I have followed various documentation to setup and build OpenJDK 
jdk9 locally. I use a Mac and at this point, I have completed the 
following set of basic tasks:

     - Checked out the mercurial repo (the complete forest) for jdk9 (hg 
tclone http://hg.openjdk.java.net/jdk9/jdk9)
     - Built the JDK locally, following the instructions under 
common/doc/building.md
     - Run some of the basic tests successfully

I have a potential fix ready and am in the process of writing a jtreg 
test for this change. I am going to sign and submit the Oracle 
Contributor Agreement this week soon (I believe that's needed right?).

Before sending out the patch for review, I would like to understand if 
there's anything else that I need to do before that. One thing that I 
read in the contribution page[1] is that "Your patch must be built and 
tested on all relevant platforms before submission". For me, the only 
platform that I have access to is going to be my local Mac OS. When I 
submit the patch, am I expected to test the changes on other *nix and 
Windows OS too?

If there's anything else that I left out, please feel free to let me 
know or point me to the doc.

[1] http://openjdk.java.net/contribute/

P.S: I hope this is the right mailing list. I read the "how to 
contribute" page and then guessed this is the correct mailing list, but 
I'm not sure since I don't see any similar contributions requests in the 
archive of this mailing list, this past year.

-Jaikiran