Erik:
Building and publishing a test image for every Jib build profile is a waste of resources. We need to be able to specify a test image from a different profile at test time when running "run-test-prebuilt". This patch takes the concept used for the -jcov profiles and makes it more general.Webrev: http://cr.openjdk.java.net/~erikj/8232569/webrev.jdk14.01/ Bug: https://bugs.openjdk.java.net/browse/JDK-8232569
Looks good. Tim
