RFR 8141609: Need test for jrtfs that runs on JDK 8 to target a JDK 9 image

[Alan Bateman]

On 24/02/2016 04:01, Felix Yang wrote:
> Jon and Alan,
>      thanks a lot for this comment. Fixed it in new webrev:
> http://cr.openjdk.java.net/~xiaofeya/8141609/webrev.01/
>
I think JrtfsJarTest will also need to check the `release` file in 
$JDK8_HOME to check that it's a JDK 8 release. Its a properties file so 
should be easy. I bring this up because I'm not sure that we can 
guarantee that JT_JAVA is a JDK 8 build.

On JrtfsTestMain then it looks like it's a copy of the jrtfs Basic.java 
test. I wonder if we should strip it down a bit to make it easier to 
maintain. I don't object to pushing the test as in into jake but there 
will be some clean-up required.

-Alan