JVET-R0110: Fix interface of JVET-R0110 of mixed lossy lossless coding
This is the merge request to fix the interface of JVET-R0110: mixed lossy/lossless coding. Two new parameters are added in the config file. For full sequence lossy coding, those values are ignored since CostMode : lossy for that case.
For full sequence lossless coding, the following are the configuration: CostMode : lossless MixedLossyLossless : 0
For mixed lossy/lossless coding: CostMode : lossless MixedLossyLossless : 1 SliceLosslessArray : 1 2 # slices with index 1 and 2 are lossless coded