objectRegistry fixes

- objectRegistry gets a rename() that also adjusts the dbDir
- cloud reworked to use static variables subInstance and defaultName.
  This avoids writing "lagrangian" everywhere

string fixes
- avoid masking of std::string::replace in string.H
- avoid old strstream in PV3FoamReader

applications/utilities/postProcessing/graphics/ensightFoamReader/USERD_get_gold_part_build_info.H

@@ -35,7 +35,7 @@ int USERD_get_gold_part_build_info
     for(label i=0; i<nPatches; i++)
     {
         word patchName(meshPtr->boundary()[i].name());
-        strncpy(part_descriptions[i+1], patchName.c_str(), Z_BUFL);   
+        strncpy(part_descriptions[i+1], patchName.c_str(), Z_BUFL);
     }
 
     label nHex08 = 0;
@@ -101,7 +101,7 @@ int USERD_get_gold_part_build_info
         */
 
     number_of_nodes[0] = meshPtr->nPoints();
-    
+
     const polyBoundaryMesh& bMesh = meshPtr->boundaryMesh();
 
     for(label i=0; i<nPatches; i++)
@@ -137,7 +137,12 @@ int USERD_get_gold_part_build_info
 
     if (Numparts_available > nPatches+1)
     {
-        strncpy(part_descriptions[nPatches+1], sprayName.c_str(), Z_BUFL);
+        strncpy
+        (
+            part_descriptions[nPatches+1],
+            cloud::subInstance.c_str(),
+            Z_BUFL
+        );
         number_of_elements[nPatches+1][Z_POINT] = sprayPtr->size();
         number_of_nodes[nPatches+1] = sprayPtr->size();
     }

applications/utilities/postProcessing/graphics/ensightFoamReader/USERD_set_filenames.H

@@ -164,7 +164,7 @@ int USERD_set_filenames
     (
         "positions",
         runTime.timeName(),
-        "lagrangian",
+        cloud::subInstance,
         runTime,
         IOobject::NO_READ,
         IOobject::NO_WRITE,
@@ -179,7 +179,7 @@ int USERD_set_filenames
 
         sprayPtr = new Cloud<passiveParticle>(*meshPtr);
 
-        IOobjectList objects(*meshPtr, runTime.timeName(), "lagrangian");
+        IOobjectList objects(*meshPtr, runTime.timeName(), cloud::subInstance);
 
         lagrangianScalarNames =
             (const wordList&)objects.names(sprayScalarFieldName);

applications/utilities/postProcessing/graphics/ensightFoamReader/getLagrangianScalar.H

@@ -12,7 +12,7 @@ if (nVar >= 0)
         (
             name,
             runTime.timeName(),
-            "lagrangian",
+            cloud::subInstance,
             mesh,
             IOobject::MUST_READ,
             IOobject::NO_WRITE

applications/utilities/postProcessing/graphics/ensightFoamReader/getLagrangianVector.H

@@ -14,7 +14,7 @@ if (nVar >= 0)
         (
             name,
             runTime.timeName(),
-            "lagrangian",
+            cloud::subInstance,
             mesh,
             IOobject::MUST_READ,
             IOobject::NO_WRITE

applications/utilities/postProcessing/graphics/ensightFoamReader/globalFoam.H

@@ -32,7 +32,6 @@ static bool isSpray[maxNames];
 static word scalarName             = "volScalarField";
 static word vectorName             = "volVectorField";
 static word tensorName             = "volTensorField";
-static word sprayName              = "lagrangian";
 static word sprayScalarFieldName   = "scalarField";
 static word sprayVectorFieldName   = "vectorField";
 static word sprayTensorFieldName   = "tensorField";