SLING-2923 - release org.apache.sling.jcr.jackrabbit.server 2.1.1

Updated karaf feature.xml to refer to o.a.s.jcr.jackrabbit.server 2.1.2

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1512268 13f79535-47bb-0310-9956-ffa450edef68