[PL/TH2M] Rename PhaseTransitionModel base class.

ProcessLib/TH2M/CreateTH2MProcess.cpp

...TH2M/PhaseTransitionModels/PhaseTransitionDissolution.cpp

...b/TH2M/PhaseTransitionModels/PhaseTransitionDissolution.h

...TH2M/PhaseTransitionModels/PhaseTransitionEvaporation.cpp

...b/TH2M/PhaseTransitionModels/PhaseTransitionEvaporation.h

...essLib/TH2M/PhaseTransitionModels/PhaseTransitionFull.cpp

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransitionFull.h

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransitionModel.h

...essLib/TH2M/PhaseTransitionModels/PhaseTransitionNone.cpp

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransitionNone.h

ProcessLib/TH2M/TH2MProcessData.h

Tests/ProcessLib/TH2M/TestTH2MPhaseTransitionEvaporation.cpp

Tests/ProcessLib/TH2M/TestTH2MPhaseTransitionNone.cpp