applications: Update ...ErrorIn -> ...ErrorInFunction

Avoids the clutter and maintenance effort associated with providing the
function signature string.

applications/utilities/preProcessing/mdInitialise/mdInitialise.C

@@ -80,7 +80,7 @@ int main(int argc, char *argv[])
 
     if (!mesh.write())
     {
-        FatalErrorIn(args.executable())
+        FatalErrorInFunction
             << "Failed writing moleculeCloud."
             << nl << exit(FatalError);
     }