Use latest pax exam

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1541911 13f79535-47bb-0310-9956-ffa450edef68
SLING-3147 - try to reproduce the observation problem (didn't succeed so far)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1541972 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of http://git.apache.org/sling into sling-3223