Various fixes (detected on the platform)

advanced/databases/atnt/4.json

advanced/databases/atnt/4.py

advanced/databases/banca/3.py

advanced/databases/banca/3.rst

advanced/databases/biosecurid_face/2.py

advanced/databases/biosecurid_face/2.rst

advanced/databases/casme2/3.py

advanced/databases/cbsr_nir_vis_2/3.py

advanced/databases/frgc/3.py

advanced/databases/gbu/3.py

advanced/databases/kboc16/3.json

advanced/databases/kboc16/3.py

advanced/databases/lfw/3.py

advanced/databases/mnist/3.py

advanced/databases/mobio/3.py

advanced/databases/utfvp/3.py

advanced/databases/voxforge/3.py

advanced/databases/xm2vts/3.py

system/dataformats/system_username/kboc16_keystroke/1.json