surfaceFilmModels: Removed dependency on the deprecated SLGThermo

SLGThermo has been moved to lagrangian, which still depends on it, pending
complete removal and replacement with a more rational interface to the carrier
phase thermodynamics.

tutorials/multiphase/compressibleInterFoam/laminar/plateFilm/constant/surfaceFilmProperties

@@ -19,15 +19,45 @@ surfaceFilmModel thermoSingleLayer;
 
 regionName      plateRegion;
 
+phase           liquid;
+
 thermophysicalProperties
 {
     type        liquid;
 
-    liquid      liquid;
+    mixture
+    {
+        liquid
+        {
+            type H2O;
 
-    useReferenceValues  yes;
-    pRef    1e5;
-    TRef    300;
+            // Set Cp constant and the corresponding linear function for h for
+            // compatibility with the current hard-coded thermodynamics model in
+            // surfaceFilm
+
+            Cp
+            {
+                a   4200;
+                b   0;
+                c   0;
+                d   0;
+                e   0;
+                f   0;
+            }
+
+            h
+            {
+                a   -1252230; // -Cp*TRef where TRef = 298.15
+                b   4200;
+                c   0;
+                d   0;
+                e   0;
+                f   0;
+            }
+        }
+    }
+
+    useReferenceValues no;
 }
 
 viscosity

tutorials/multiphase/compressibleInterFoam/laminar/plateFilm/constant/thermophysicalProperties.liquid

@@ -23,7 +23,7 @@ thermoType
     energy          sensibleInternalEnergy;
 }
 
-"(mixture|liquids)"
+mixture
 {
     liquid
     {