[JVT-S043] - Multi layer quality layers

JSVM/H264Extension/src/test/BitStreamExtractor/Extractor.cpp

JSVM/H264Extension/src/test/BitStreamExtractor/Extractor.h

...ension/src/test/BitStreamExtractor/ExtractorParameter.cpp

...xtension/src/test/BitStreamExtractor/ExtractorParameter.h

...on/src/test/QualityLevelAssigner/QualityLevelAssigner.cpp

...sion/src/test/QualityLevelAssigner/QualityLevelAssigner.h

.../src/test/QualityLevelAssigner/QualityLevelEstimation.cpp

...on/src/test/QualityLevelAssigner/QualityLevelEstimation.h

...n/src/test/QualityLevelAssigner/QualityLevelParameter.cpp

...ion/src/test/QualityLevelAssigner/QualityLevelParameter.h

JSVM0-config-samples/Extractor_usage.txt

JSVM0-config-samples/QualityLayer_usage.txt

Validation/SimuDataBase/SIMUSAMPLE.TXT

Validation/SimuDataBase/Short_term/MLQL/MLQL.txt

Validation/SimuDataBase/Short_term/MLQL/cfg/MLQL.cfg

Validation/SimuDataBase/Short_term/MLQL/cfg/MLQL_L0.cfg

Validation/SimuDataBase/Short_term/MLQL/cfg/MLQL_L1.cfg

Validation/Tools/External.pm