The goal of this enhancement is to extend the security.testlibrary.Proc class to support passing Security properties to launched tests. This enhancement has been introduced in later JDK releases as a side-change of the JDK-8209901 fix. Please notice that this is not a backport of JDK-8209901 as it does not address in essence the same issue: I'm including a reference because the changes to the Proc.java class are taken from there. These changes do not apply cleanly because of hook contexts, but they can be trivially fixed without any change to neither the added lines nor the existing logic.

The changes proposed here affect tests only and the risk is minimal. I think this would be beneficial to have cleaner test backports, and a more reliable test infrastructure.

I'm targeting 8u because newer LTS/currently-maintained releases are not affected.