gfs2_utils: more gfs2_convert i_goal fixes
    
    The correct goal was only being set on files that are >= meta
    height 2. This patch fixes this and sets correct goal values for
    stuffed, height 1 and jdata files as well
    
    Resolves: rhbz#1186847
    Signed-off-by: Abhi Das <adas@redhat.com>