The changes done for JDK-8140189 depend on jtreg support for external.lib.roots, which became available in 4.1 b12. Currently TEST.ROOT indicates that only 4.1 b11 is needed. It needs to be updated to b12.
JDK-8075555Add tiered testing definitions to the nashorn repo
JDK-8140189[TESTBUG] Get rid of "@library /../../test/lib" in jtreg tests