hg: jdk/jdk: 8246387: switch to jtreg 5.1

[igor.ignatyev at oracle.com]

Changeset: 506abc554cae
Author:    iignatyev
Date:      2020-06-10 10:47 -0700
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/506abc554cae

8246387: switch to jtreg 5.1
Reviewed-by: dholmes, erikj

! make/conf/jib-profiles.js
! test/failure_handler/src/share/classes/jdk/test/failurehandler/jtreg/GatherDiagnosticInfoObserver.java
! test/hotspot/jtreg/TEST.ROOT
! test/hotspot/jtreg/runtime/condy/staticInit/TestInitException.java
! test/jaxp/TEST.ROOT
! test/jdk/TEST.ROOT
! test/langtools/TEST.ROOT
! test/lib-test/TEST.ROOT
! test/lib/jdk/test/lib/Utils.java
! test/lib/jdk/test/lib/cds/CDSTestUtils.java