RFR 8184904/10, jdk/internal/jrtfs/WithSecurityManager fails with exploded builds

[Felix Yang]

Hi Alan,
    pushed as suggested.

Thanks,
Felix
> On 20 Jul 2017, at 7:23 PM, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> This skips the testing on exploded builds, which I think is okay. A minor point before pushing is that you replace "lib/modules" with "lib", "modules" as the elements will be joined by the method.
> 
> -Alan