RFR(S) : 8178695: jdk.test.lib.artifacts.ArtifactContainer has to be public

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8178695/webrev.00/index.html
> 38 lines changed: 33 ins; 5 del; 0 mod; 

Hi all,

could you please review this small fix for the testlibrary?

@ArtifactContainer is created to support repeating @Artifact annotations, but it is package private class, which causes a compilation error if one uses more than one @Artifact. the fix make j.t.l.a.ArtifactContainer publicly accessible.

webrev: http://cr.openjdk.java.net/~iignatyev//8178695/webrev.00/index.html
JBS: https://bugs.openjdk.java.net/browse/JDK-8178695

Thanks,
-- Igor