Merge branch 'bugfix_fluidexpansivity' into 'master'

[PL/TRM] Fix sign in FluidThermalExpansion

See merge request !4394

ProcessLib/ThermoRichardsMechanics/ConstitutiveCommon/FluidThermalExpansion.cpp

@@ -30,7 +30,7 @@ void FluidThermalExpansionModel<DisplacementDim>::eval(
     namespace MPL = MaterialPropertyLib;
     MPL::VariableArray variables;
     variables.phase_pressure = -p_cap_data.p_cap;
-    variables.temperature = -T_data.T;
+    variables.temperature = T_data.T;
 
     double const phi = poro_data.phi;
     double const alpha = biot_data.alpha;