Update to parent pom v19

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1583337 13f79535-47bb-0310-9956-ffa450edef68
SLING-3017 exclude broken test (NoClassDefFoundError in SlingExtensionEventIT) for now

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1583340 13f79535-47bb-0310-9956-ffa450edef68