restrict to DN 3.0 jars for when we start releasing 3.1
restrict to DN 3.0 jars for when we start releasing 3.1
GoogleCloudPlatform/datanucleus-appengine,GoogleCloudPlatform/datanucleus-appengine,GoogleCloudPlatform/datanucleus-appengine,GoogleCloudPlatform/datanucleus-appengine