RFR [14] 8226303: Test convenience reactive primitives from java.net.http with RS TCK

[Pavel Rappo]

> On 2 Jul 2019, at 13:46, Daniel Fuchs <daniel.fuchs at oracle.com> wrote:
> 
> Thanks for doing that! LGTM.

I've pushed the change

    http://hg.openjdk.java.net/jdk/jdk/rev/3ae57bbf9585

For the record. In addition to what we've discussed I had to fix the TCK source
by making it compliant with jcheck. That extra fix comprises removing trailing
whitespace and adding trailing newline where it was missing.