JDK-8230067 added jtreg retries, but it does so awkwardly: it sets `export JTREG_STATUS="-status:error,fail";` on retry, and then uses it as `-status:$$$${JTREG_STATUS}`.

Which means we end up passing either: `-status:` or `-status:-status:error,fail` to jtreg. I confirmed this by also instrumenting the local jtreg build.

Now, it is not a problem for current jtreg, because it checks the status codes awkwardly with `String.contains`:
https://github.com/openjdk/jtreg/blob/aeb552e6df73e039e20de59b3ec847f36ab6e202/src/share/classes/com/sun/javatest/regtest/tool/Tool.java#L1635-L1640

But it will be a problem if jtreg ever starts to validate the arguments properly. I propose we fix this in current build system.