SLING-3972 - Remove openid from launchpad

Also move affected integration tests from launchpad/testing to
contrib/launchpad/testing

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1628372 13f79535-47bb-0310-9956-ffa450edef68
SLING-3618 : Unable to create node at /var/discovery error in sling trunk

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1628377 13f79535-47bb-0310-9956-ffa450edef68