interpolationTable: Correcting header documentation

fanPressureFvPatchScalarField.H:  Correcting header documentation
RAS/TJunctionFan/0.orig: Creating tutorial for fanPressure
Adding pRef and pValue for tutorial createZeroDirectory/snappyMultiRegionHeater

src/OpenFOAM/interpolations/interpolationTable/interpolationTable.H

@@ -42,7 +42,7 @@ Description
     Read csv format:
     \verbatim
         readerType      csv;
-        fileName        "$FOAM_CASE/constant/p0vsTime.csv";
+        file            "$FOAM_CASE/constant/p0vsTime.csv";
         hasHeaderLine   true;   // skip first line
         timeColumn      0;      // time is in column 0
         valueColumns    (1);    // value starts in column 1

src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.H

@@ -52,7 +52,7 @@ Description
 Usage
     \table
         Property     | Description             | Required    | Default value
-        fileName     | fan curve file name     | yes         |
+        file         | fan curve file name     | yes         |
         outOfBounds  | out of bounds handling  | yes         |
         direction    | direction of flow through fan [in/out] | yes |
         p0           | environmental total pressure | yes    |

tutorials/incompressible/pimpleFoam/RAS/TJunctionFan/0.orig/p

@@ -23,12 +23,17 @@ boundaryField
 {
     inlet
     {
-        type            uniformTotalPressure;
-        p0              table
-        (
-            (0 10)
-            (1 40)
-        );
+        type            fanPressure;
+        outOfBounds     clamp;
+        direction       in;
+        readerType      openFoam;
+        hasHeaderLine   true;
+        file            "$FOAM_CASE/constant/FluxVsdP.dat";
+        //nonDimensional  true;
+        //rpm             300;
+        //dm              2e-2;
+        outOfBounds     clamp;
+        p0              uniform 30;
     }
     outlet1
     {

tutorials/incompressible/pimpleFoam/RAS/TJunctionFan/constant/FluxVsdP.dat

+(
+    (0      20)
+    (0.0023 10)
+    (0.003  5)
+);

tutorials/preProcessing/createZeroDirectory/snappyMultiRegionHeater/system/bottomAir/fvSolution

@@ -68,6 +68,8 @@ PIMPLE
     momentumPredictor   on;
     nCorrectors         2;
     nNonOrthogonalCorrectors 0;
+    pRefCell            0;
+    pRefValue           1e5;
 }
 
 relaxationFactors

tutorials/preProcessing/createZeroDirectory/snappyMultiRegionHeater/system/topAir/fvSolution

@@ -68,6 +68,8 @@ PIMPLE
     momentumPredictor   on;
     nCorrectors         2;
     nNonOrthogonalCorrectors 0;
+    pRefCell            0;
+    pRefValue           1e5;
 }
 
 relaxationFactors