SLING-3027 SLING-3017 SLING-3821 update Karaf to 3.0.2 and Pax Exam to 4.3.0 (disable 2 failing ITs for now)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1639995 13f79535-47bb-0310-9956-ffa450edef68