Force-Save Diskspace by deleting unneeded but cached jdks (but only when TRAVIS is set as env variable, so we don't impact regular users)
Force-Save Diskspace by deleting unneeded but cached jdks (but only when TRAVIS is set as env variable, so we don't impact regular users)

jMonkeyEngine/sdk,jMonkeyEngine/sdk,jMonkeyEngine/sdk,jMonkeyEngine/sdk