DataEntry: Created the DataEntryTypes namespace for all the concrete DataEntry types

to avoid name conflicts with these primitive names in the OpenFOAM namespace

applications/utilities/postProcessing/noise/noise.C

@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
     #include "createFields.H"
 
     Info<< "Reading data file" << endl;
-    CSV<scalar> pData("pressure", dict, "Data");
+    DataEntryTypes::CSV<scalar> pData("pressure", dict, "Data");
 
     // time history data
     const scalarField t(pData.x());