Add the decoder checking for duplicated DCI

cfg/encoder_randomaccess_vtm.cfg

source/App/EncoderApp/EncApp.cpp

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/Slice.h

source/Lib/CommonLib/TypeDef.h

source/Lib/DecoderLib/DecLib.cpp

source/Lib/DecoderLib/DecLib.h

source/Lib/DecoderLib/VLCReader.cpp

source/Lib/EncoderLib/EncCfg.h

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/EncLib.h

source/Lib/EncoderLib/VLCWriter.cpp

source/Lib/EncoderLib/VLCWriter.h