TUT: add new tutorial case for turbulent inflow BCs

The following three synthetic turbulence inflow boundary conditions are
examined through single-cell-domain smooth-wall plane channel flow setup:

- turbulentDFSEMInlet
- turbulentDigitalFilterInlet variant=digitalFilter
- turbulentDigitalFilterInlet variant=reducedDigitalFilter

The examinations are performed in terms of the first-/second-order turbulence
statistics provided by (Moser et al., (1999)) doi.org/10.1063/1.869966
from smooth-wall plane channel flow direct numerical simulations at Re=395.

Serial executing:

./Allrun

Parallel (decompositionMethod=scotch) executing:

./Allrunparallel

tutorials/verificationAndValidation/turbulentInflow/system/controlDict

@@ -0,0 +1,103 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     pimpleFoam;
+
+startFrom       latestTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         85;
+
+deltaT          4e-3;
+
+writeControl    timeStep;
+
+writeInterval   1250;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  8;
+
+writeCompression off;
+
+timeFormat      general;
+
+timePrecision   8;
+
+runTimeModifiable false;
+
+adjustTimeStep false;
+
+functions
+{
+    fieldAverage1
+    {
+        type                fieldAverage;
+        libs                ("libfieldFunctionObjects.so");
+        enabled             true;
+        writeControl        writeTime;
+        timeStart           8.5;
+        restartOnRestart    false;
+        fields
+        (
+            U
+            {
+                mean        on;
+                prime2Mean  on;
+                base        time;
+            }
+        );
+    }
+
+    inletSampling
+    {
+        type                sets;
+        libs                ("libsampling.so");
+        enabled             true;
+        writeControl        writeTime;
+        timeStart           8.5;
+        restartOnRestart    false;
+        interpolationScheme cellPoint;
+        setFormat           raw;
+        fields              (UPrime2Mean);
+
+        sets
+        (
+            inletPatch
+            {
+                type        face;
+                axis        y;
+                start       (0.0 0 1.57);
+                end         (0.0 2 1.57);
+            }
+            inletCell
+            {
+                type        face;
+                axis        y;
+                start       (0.062832 0 1.57);
+                end         (0.062832 2 1.57);
+            }
+        );
+    }
+}
+
+// ************************************************************************* //