Obsolete ceph-libcephfs
    
    Correct the name of the obsoleted package. It used to be called
    "ceph-libcephfs" and not "libcephfs".
    
    Transaction check error:
    file /usr/lib64/libcephfs.so.1.0.0 from install of
    libcephfs1-1:0.80.5-5.fc21.x86_64 conflicts with file from package
    ceph-libcephfs-0.81.0-6.fc21.x86_64