Add sync file for 3.3.1.5, including instructions for creating new ve…

[etsauer]

What does this PR do?

Updates image sync script to run against 3.3.1.5. Also added instructions to readme for how to do this for future versions.

How should this be manually tested?

Follow solutions/disconnected_installs/README.md

Is there a relevant Issue open for this?

n/a

Who would you like to review this?

/cc @sabre1041 @oybed @

…rsion files

[sabre1041]

lgtm