Adapt test to behave correctly when dealing with expected null value.
Fixed NAMEFormat reads.
Fixed E_STATUTFormat.
Fixed DIRECTIONFormat.
Fixed FONCTIONType2Format reads.
Fixed FONCTIONFormat, FONCTIONTypeFormat, FONCTIONType2Format reads.
Fixed TYPEFormat reads.
JSON reads fully implemented. More tests on actual content must follow.