GeometricField: Renamed internalField() -> primitiveField() and dimensionedInternalField() -> internalField()

These new names are more consistent and logical because:

primitiveField():
primitiveFieldRef():
    Provides low-level access to the Field<Type> (primitive field)
    without dimension or mesh-consistency checking.  This should only be
    used in the low-level functions where dimensional consistency is
    ensured by careful programming and computational efficiency is
    paramount.

internalField():
internalFieldRef():
    Provides access to the DimensionedField<Type, GeoMesh> of values on
    the internal mesh-type for which the GeometricField is defined and
    supports dimension and checking and mesh-consistency checking.

applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightField.C

@@ -603,7 +603,7 @@ void ensightPointField
         writeField
         (
             "coordinates",
-            Field<Type>(pf.internalField(), eMesh.uniquePointMap()),
+            Field<Type>(pf.primitiveField(), eMesh.uniquePointMap()),
             ensightFile
         );
     }
@@ -646,7 +646,7 @@ void ensightPointField
                 writeField
                 (
                     "coordinates",
-                    Field<Type>(pf.internalField(), uniqueMeshPointLabels),
+                    Field<Type>(pf.primitiveField(), uniqueMeshPointLabels),
                     ensightFile
                 );
 
@@ -692,7 +692,7 @@ void ensightPointField
                     "coordinates",
                     Field<Type>
                     (
-                        pf.internalField(),
+                        pf.primitiveField(),
                         uniqueMeshPointLabels
                     ),
                     ensightFile

applications/utilities/postProcessing/dataConversion/foamToTetDualMesh/foamToTetDualMesh.C

@@ -91,7 +91,7 @@ void ReadAndMapFields
             )
         );
 
-        Field<Type>& fld = tetFields[i].internalFieldRef();
+        Field<Type>& fld = tetFields[i].primitiveFieldRef();
 
         // Map from read field. Set unmapped entries to nullValue.
         fld.setSize(map.size(), nullValue);

applications/utilities/postProcessing/dataConversion/foamToVTK/writeFunsTemplates.C

@@ -79,7 +79,7 @@ void Foam::writeFuns::write
 
     DynamicList<floatScalar> fField(pTraits<Type>::nComponents*nValues);
 
-    insert(vvf.internalField(), fField);
+    insert(vvf.primitiveField(), fField);
 
     forAll(superCells, superCelli)
     {