[PL/TH2M] Rename phase transition files. Phase now either on or off.

ProcessLib/TH2M/CreateTH2MProcess.cpp

ProcessLib/TH2M/PhaseTransitionModels/NoPhaseTransition.cpp

ProcessLib/TH2M/PhaseTransitionModels/NoPhaseTransition.h

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransition.cpp

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransition.h

...TH2M/PhaseTransitionModels/PhaseTransitionDissolution.cpp

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

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

ProcessLib/TH2M/PhaseTransitionModels/PhaseTransitionFull.h

ProcessLib/TH2M/TH2MProcessData.h

Tests/ProcessLib/TH2M/TestTH2MPhaseTransitionEvaporation.cpp

Tests/ProcessLib/TH2M/TestTH2MPhaseTransitionNone.cpp