Revert "15.04.0-1"
    
    This reverts commit 1bcdaa4a1093b2d430ea9172deb7e7e84f81cf19.
    
    Reverting the upgrade to 15.04.1 in f22 so we can finally push a fix for the
    showstopper #1219583 without introducing other changes that might not match the
    applications we ship.