RFR 8200241: [TESTBUG] java/lang/String/concat/ tests should not force source/release = 9 anymore

[Paul Sandoz]

+1
Paul.

> On Mar 26, 2018, at 6:22 AM, Aleksey Shipilev <shade at redhat.com> wrote:
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8200241
> 
> Webrev:
>  http://cr.openjdk.java.net/~shade/8200241/webrev.01/
> 
> As discussed in a separate thread on this list, we do not need source/target = 9 in these tests anymore.
> 
> Testing: make run-test TEST=test/jdk/java/lang/String/concat/, Linux x86_64 {fastdebug|release}
> 
> Thanks,
> -Aleksey
>