Standardized the selection of required and optional fields in BCs, fvOptions, functionObjects etc.

In most boundary conditions, fvOptions etc. required and optional fields
to be looked-up from the objectRegistry are selected by setting the
keyword corresponding to the standard field name in the BC etc. to the
appropriate name in the objectRegistry.  Usually a default is provided
with sets the field name to the keyword name, e.g. in the
totalPressureFvPatchScalarField the velocity is selected by setting the
keyword 'U' to the appropriate name which defaults to 'U':

        Property     | Description             | Required    | Default value
        U            | velocity field name     | no          | U
        phi          | flux field name         | no          | phi
        .
        .
        .

However, in some BCs and functionObjects and many fvOptions another
convention is used in which the field name keyword is appended by 'Name'
e.g.

        Property     | Description             | Required    | Default value
        pName        | pressure field name     | no          | p
        UName        | velocity field name     | no          | U

This difference in convention is unnecessary and confusing, hinders code
and dictionary reuse and complicates code maintenance.  In this commit
the appended 'Name' is removed from the field selection keywords
standardizing OpenFOAM on the first convention above.

tutorials/lagrangian/DPMFoam/Goldschmidt/constant/kinematicCloudProperties

@@ -172,7 +172,7 @@ subModels
             cohesionEnergyDensity 0;
         };
 
-        UName U.air;
+        U     U.air;
     }
 
     stochasticCollisionModel none;

tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G

@@ -24,7 +24,6 @@ boundaryField
     top
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1.0;
         value           uniform 0;
@@ -32,7 +31,6 @@ boundaryField
     bottom
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1.0;
         value           uniform 0;
@@ -40,7 +38,6 @@ boundaryField
     walls
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1.0;
         value           uniform 0;

tutorials/lagrangian/reactingParcelFilmFoam/hotBoxes/0.orig/T

@@ -30,7 +30,7 @@ boundaryField
     {
         type            zeroGradient;
 //        type            mapped;
-//        fieldName       Tsf;
+//        field       Tsf;
 //        average         300;
 //        setAverage      no;
 //        value           uniform 300;

tutorials/lagrangian/reactingParcelFilmFoam/hotBoxes/0.orig/U

@@ -31,7 +31,7 @@ boundaryField
         type            uniformFixedValue;
         uniformValue    (0 0 0);
 //        type            mapped;
-//        fieldName       Usf;
+//        field       Usf;
 //        average         (0 0 0);
 //        setAverage      no;
 //        value           uniform (0 0 0);

tutorials/lagrangian/reactingParcelFilmFoam/hotBoxes/system/changeDictionaryDict

@@ -23,7 +23,7 @@ dictionaryReplacement
             wallFilm
             {
                 type            mapped;
-                fieldName       Tsf;
+                field       Tsf;
                 average         300;
                 setAverage      no;
                 value           uniform 300;
@@ -38,7 +38,7 @@ dictionaryReplacement
             wallFilm
             {
                 type            mapped;
-                fieldName       Usf;
+                field       Usf;
                 average         (0 0 0);
                 setAverage      no;
                 value           uniform (0 0 0);

tutorials/lagrangian/reactingParcelFilmFoam/rivuletPanel/constant/surfaceFilmProperties

@@ -26,7 +26,7 @@ kinematicSingleLayerCoeffs
     filmThermoModel constant;
     constantCoeffs
     {
-        specieName  water;
+        specie      water;
         rho0        1000;
         mu0         1e-3;
         sigma0      0.07;

tutorials/lagrangian/reactingParcelFoam/counterFlowFlame2DLTS/0/p

@@ -33,8 +33,6 @@ boundaryField
     {
         type            totalPressure;
         p0              $internalField;
-        U               U;
-        phi             phi;
         rho             none;
         psi             none;
         gamma           1;

tutorials/lagrangian/reactingParcelFoam/filter/0.orig/G

@@ -24,7 +24,6 @@ boundaryField
     walls
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1;
         value           uniform 0;
@@ -35,7 +34,6 @@ boundaryField
     inlet
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1;
         value           uniform 0;

tutorials/lagrangian/reactingParcelFoam/filter/0/G

@@ -24,7 +24,6 @@ boundaryField
     walls
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1;
         value           uniform 0;
@@ -35,7 +34,6 @@ boundaryField
     inlet
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1;
         value           uniform 0;

tutorials/lagrangian/reactingParcelFoam/parcelInBox/0/G

@@ -32,7 +32,6 @@ boundaryField
     walls
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1.0;
         value           uniform 0;
@@ -44,7 +43,6 @@ boundaryField
     inlet
     {
         type            MarshakRadiation;
-        T               T;
         emissivityMode  lookup;
         emissivity      uniform 1.0;
         value           uniform 0;