JBDS-2807 fix URLs in discovery plugins (1.0.1, 1.1.1, 1.2.1) for JBT 3.3.2 (Indigo), 4.0.1 (Juno), and 4.1.0.1 (Kepler); remove obsolete 1.2.2.Alpha2-v20131002-1630-B348 plugin too