avoided some unneeded conversions of string::npos, minor cleanup of className

- string doesn't use any debug info, remove it
- restructured the macros to add in NoDebug macro versions to className,
  typeInfo.  Might be helpful with tackling the globals bootstrapping issue.
- HashTableName + StaticHashTableName - avoid lookup of debug switch when
  FULLDEBUG is not defined

src/OpenFOAM/primitives/strings/string/string.C

@@ -25,13 +25,10 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "string.H"
-#include "debug.H"
 #include "OSspecific.H"
 
 /* * * * * * * * * * * * * * * Static Member Data  * * * * * * * * * * * * * */
 
-const char* const Foam::string::typeName = "string";
-int Foam::string::debug(debug::debugSwitch(string::typeName, 0));
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //