multiphaseExternalTemperature → phaseSystem Relation

File in applications/modules/multiphaseEuler/thermophysicalTransportModels/derivedFvPatchFields/multiphaseExternalTemperature	Includes file in applications/modules/multiphaseEuler/phaseSystem
multiphaseExternalTemperatureFvPatchScalarField.C	phaseSystem / phaseSystem.H