ENH: additional decompose options

- decomposePar: -no-fields to suppress decomposition of fields

- makeFaMesh: -no-decompose to suppress creation of *ProcAddressing
  and fields, -no-fields to suppress decomposition of fields only

src/parallel/decompose/faDecompose/faFieldDecomposerReadFields.C

@@ -46,13 +46,6 @@ void Foam::faFieldDecomposer::readFields
     // Search list of objects for fields of type GeoField
     IOobjectList fieldObjects(objects.lookupClass<GeoField>());
 
-    /// // Remove the cellDist field
-    /// auto iter = fieldObjects.find("cellDist");
-    /// if (iter.found())
-    /// {
-    ///     fieldObjects.erase(iter);
-    /// }
-
     // Use sorted set of names
     // (different processors might read objects in different order)
     const wordList masterNames(fieldObjects.sortedNames());

src/parallel/decompose/faDecompose/faMeshDecomposition.H

@@ -155,19 +155,19 @@ public:
     // Settings
 
         //- Number of processor in decomposition
-        label nProcs() const
+        label nProcs() const noexcept
         {
             return nProcs_;
         }
 
         //- Is decomposition data to be distributed for each processor
-        bool distributed() const
+        bool distributed() const noexcept
         {
             return distributed_;
         }
 
         //- Change distributed flag
-        bool distributed(const bool on)
+        bool distributed(const bool on) noexcept
         {
             bool old(distributed_);
             distributed_ = on;
@@ -175,13 +175,13 @@ public:
         }
 
         //- Are global face zones used
-        bool useGlobalFaceZones() const
+        bool useGlobalFaceZones() const noexcept
         {
             return distributed_;
         }
 
         //- Change global face zones flag
-        bool useGlobalFaceZones(const bool on)
+        bool useGlobalFaceZones(const bool on) noexcept
         {
             bool old(hasGlobalFaceZones_);
             hasGlobalFaceZones_ = on;