hg: jdk/sandbox: 8216577: Add GlobalSign's R6 Root certificate

[chris.hegarty at oracle.com]

Changeset: bcea46e28de0
Author:    rhalade
Date:      2019-04-30 11:04 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/bcea46e28de0

8216577: Add GlobalSign's R6 Root certificate
Reviewed-by: mullan, clanger

! src/java.base/share/lib/security/cacerts
+ test/jdk/security/infra/java/security/cert/CertPathValidator/certification/GlobalSignR6CA.java
! test/jdk/sun/security/lib/cacerts/VerifyCACerts.java