Adds test for upgrading from 3.13 to 4.x
Adds test for upgrading from 3.13 to 4.x

We ran this many times with -unitItFails and never saw it fail

concourse/concourse#2595

Signed-off-by: Saman Alvi <a99666c385ff8d52f85bf6d52848ed17df23a2c5@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse