SLING-2848 : Event integration tests fail due to unresolvable artifacts

Added support for the maven.repo.local system property in
AbstractJobHandlingTest. The tests fail for me locally since they
reference a snapshot artifact - org.apache.sling.jcr.jackrabbit.server -
but let's see if this fixes the build on Jenkins.


git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1477924 13f79535-47bb-0310-9956-ffa450edef68