SLING-3821 update Pax Exam to 4.2.0

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1625352 13f79535-47bb-0310-9956-ffa450edef68
SLING-3821 update Pax Exam to 4.2.0

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1625353 13f79535-47bb-0310-9956-ffa450edef68